Each year since 1994, in conjunction with its annual Board of Trustees
meeting, JHPIEGO has convened a workshop that deals with a reproductive health topic in
which training plays an important role. This years workshop was held on 21 and 22
May 1997 and dealt with cancer of the cervix, the same reproductive health topic that
JHPIEGOs first Board of Trustees workshop focused on in 1994. Whereas the 1994
workshop reviewed the status of cervical cancer screening worldwide and discussed
alternative methods of detecting cervical cancer, this years presentations discussed
screening and treatment options, specifically focusing on alternatives for
low-resource settings. Workshop participants included JHPIEGOs international board
members plus a select group of health professionals involved in cervical cancer programs
worldwide.
The issue of whether cancer of the cervix is a public health
problem meriting attention by national health programs as well as donor and development
assistance organizations was not discussed at length in this workshop. Rather, the
workshop was dedicated to identifying approaches that could be used to address cervical
cancer in settings where this disease has been identified as a public health
priority. To accomplish this, participants were first updated on the scientific evidence
available that supports various cervical cancer screening and treatment options. These
updates were followed by reports on and discussions of country experiences with cervical
cancer screening and treatment programs and field perspectives on these types of programs
in a number of developing countries.
Workshop Objectives
- Reach consensus on the appropriateness of visual inspection as an
alternative cervical cancer screening technique
- Review the usefulness of a see and treat approach for managing
pre-invasive cervical disease
- Identify issues related to the introduction of alternative
screening and treatment approaches for pre-invasive cervical disease in low-resource
settings
- Identify approaches for integrating competency-based training on the
management of pre-invasive cervical disease into reproductive health training
Introduction
Given the scope of the cervical cancer problem in developing countries,
coupled with the difficulties that have been encountered in many of these countries when
attempting to implement cytology-based screening programs, this workshop focused on
alternative, low-resource screening optionssome of which have been available for
decades. Major workshop themes included the importance of assessing the cost-effectiveness
of currently used cervical cancer screening and treatment methods and finding ways to
overcome barriers to implementing successful screening programs in developing countries.
Workshop participants were given an opportunity to examine cytology-based
screeningthe current screening standard worldwideand consider its
clinical effectiveness and programmatic limitations. They also were provided a historical
review of research on visual inspection for cervical cancer screeningincluding
updates on recently completed and ongoing studies. This review enhanced the
participants ability to consider the potential role of visual inspection as an
alternative to cytology for cervical cancer screening in low-resource settings. Following
a consideration of cervical cancer screening alternatives, cervical cancer
treatment options were discussed. This involved a review of the efficacy of loop
electrosurgical excision procedure (LEEP) and cryotherapy as well as the feasibility of
using these treatment options in low-resource settings. Several additional themes were
also considered that are particularly relevant in many developing countries where
resources are scarce. For example, the problem of loss-to-followup (i.e., women not
returning for followup diagnostic tests and treatment) is a major barrier to the success
of screening and treatment programs in many developing country settings. The "see and
treat" approachin which treatment, if needed, is offered immediately after
screening during a single visitwas introduced as a possible solution to this
problem. Participants examined this option as it relates to the issue of overtreatment and
how this affects healthcare systems and individuals within those systems.
Scope of the Problem
Cervical cancer is the most common cancer and the leading cause of
cancer death among women in developing countries. It is estimated that 200,000 to 300,000
women die from cervical cancer every year, mostly in poorer countries (Franco and
Monsonego 1997; Parkin, Pisani and Ferlay 1993). Even more sobering are findings from
recent studies which suggest that human immunodeficiency virus (HIV)-positive women are at
increased risk for cervical cancer (Judson 1992), and HIV rates are known to be on
the increase in many of the same countries in which cervical cancer is a leading cause of
cancer deaths. Thus, it is very likely that deaths due to cervical cancer will increase in
these countries in the coming years. Death resulting from cervical cancer is
particularly tragic because this type of cancer develops slowly and has a detectable
precursor condition, carcinoma in situ (CIS), which is treatable.
Screening
Cost-Effectiveness of Cervical Cancer Screening
A study funded by the World Bank supports the claim that cervical cancer
screening is not only of value in terms of lives saved but also that it is a cost-effective
public health intervention (Jamison et al 1993). In that study, the cost per
disability-adjusted life year (DALY)1 gained for cervical
cancer screening (assuming screening for all women every 5 years) is about $100.2 This compares favorably to other preventive health
interventions (e.g., $30 to $250 per DALY for antenatal/delivery care, $15 to $75 for
increased condom use, $30 to $150 for IUD services) and is a fraction of the estimated
cost ($2,600) for treatment/palliative care for cervical cancer (Program for Appropriate
Technology in Health [PATH] 1997). It is reasonable to assume that in many settings the
cost-effectiveness of cervical cancer screening could be increased even further if there
were greater coverage of high-risk women, screened at intervals greater than 5 years, and
if less expensive outpatient therapeutic approaches were used to treat cervical lesions.
Cytology-Based Screening
In 1989, the pathologist Leo Koss observed that "there has been no
objective statistical analysis of the optimal performance of [the cervical smear]"
(Koss 1989). In fact, the Papanicolaou ("Pap") smear is one of a unique group of
tests that have been widely adopted into standard (western) clinical practice without
first being subjected to rigorous, prospective blinded studies to examine their
effectiveness (Franco and Monsonego 1997). Regardless, over time, the Pap test has proven
to be a clinically useful tool, and both clinicians and researchers alike claim it has
played an important role in cancer reduction.
In developed countries, cytology-based services utilizing the Pap smear
have been the basis of cervical cancer screening and detection programs for many years.
While some data suggest that cervical cancer rates began to decrease before large-scale
Pap smear screening programs were introduced (perhaps in association with the reduction in
parity that has occurred since World War II), it is generally accepted that the initiation
of such national screening programs is largely responsible for, or at least has
contributed in a significant manner to, the marked decline in cervical cancer deaths in
those countries in the ensuing years. Decreases in the incidence rates of cervical cancer
have occurred in Finland, Iceland and Sweden, where national population-based programs
have been in operation at least since the early 1970s. In Finland, a 65% reduction in the
incidence rates of cervical cancer was observed between 19661970 and 19811985.
By contrast, in Norway, where only 5% of the population was covered by a cervical cancer
screening program, the reduction in cervical cancer incidence was only 20% during this
same 15-year period. These findings indicate a B correlation between the extent
(coverage) of a screening program and the reduced incidence of invasive cervical cancer
(Franco and Monsonego 1997).
Limitations of Cervical Cancer Screening in Developing Countries
In most developing countries, only 5% of women at any point in time have
been screened within the past 5 years (WHO 1986). If the burden of disease is high and
screening is known to be a cost-effective intervention, why isnt screening more
prevalent in most developing countries? One reason relates to the nature of the Pap smear,
the most common form of screening performed worldwide. Cytology-based screening programs
are complex and can be costly. Although performing a Pap test may seem relatively simple,
from both a clinical and programmatic perspective, a large number of steps are required to
take an adequate smear, process and analyze the specimen, and inform patients of the
results. If any of these steps are unreliable or logistically burdensome, the entire
screening program could break down and, with it, the potential for any public health
benefit.
Unfortunately, many, if not all, of these steps can be problematic in
many developing countries. For example, whatever cytology screening services that do exist
in such resource-limited settings are usually offered only in urban settings by a small
private sector or at referral facilities. And, even in these settings, trained
cytotechnicians and cytopathologists are scarce and turnaround times for processing and
reading specimens are slow. Thus, patients do not receive their results promptly and
followup losses (including patients lost to treatment) are high. Given this reality, if
screening (and subsequent treatment) is to have a measurable effect on the burden of
disease borne by women and the healthcare system, it is apparent that cervical cancer
screening based on an approach other than just Pap smears is needed.
History of Research on Visual Inspection
Historically, before the advent of Pap smears and programmatic
screening, healthcare providers relied on looking at the cervix to detect abnormalities.
For example, the Schiller test (i.e., application of dilute aqueous iodine solution to the
cervix to aid in differentiating "mature" normal from "immature"
abnormal epithelium) has been used for many years.
After the 1950s, when the Pap smear became the standard for cervical
cancer screening, increasing numbers of women undergoing this test led to increased
utilization of the colposcope (initially developed in the 1930s) to confirm
screening findings. Years later, given the expense and inconvenience of colposcopy
services, clinicians began to explore whether unmagnified visualization of the cervix
(with acetic acid) could be used as an adjunct to cytology so that patients in need
of colposcopy could be identified more effectively and efficiently. Few studies were
conducted, however, that examined the value of unmagnified inspection of the cervix after
the application of acetic acid for purposes of identifying a normal "transformation
zone" or detecting precancerous lesions of the cervix (i.e., primary screening).
Then, in 1982, Ottaviano and La Torre published an important study
involving 2,400 women who were examined visually and colposcopically after a cervical wash
with acetic acid. A key result was that "naked-eye" (unmagnified) inspection
detected abnormalities in 98.4% of the cases (i.e., in 307 of 312 patients assessed
colposcopically as having an abnormal transformation zone). In addition, (unmagnified)
visual inspection with acetic acid (VIA) identified 98.9% of the cases as normal (i.e., in
1,568 of 1,584 women diagnosed as normal by colposcopy). These authors concluded that
"colposcopic magnification is not essential in clinical practice for the
identification of the cervix at risk" (Ottaviano and La Torre 1982).
Subsequently, in 1990, Abrams published his experience with the
"Gynoscope," a monocular telescope with a magnifying power of 2.5, which he
developed as an adjunct to cytological screening (Abrams 1990). In that study, Abrams
reported a high correlation between the (visual) Gynoscope examination and cytology
(supplemented by biopsy results in a few cases).3 His findings
suggested that the use of a low-power device could provide excellent results as an adjunct
to cytology and "should be considered as a practical adjunct that will encourage
better sampling by the clinician . . . [and] alert the pathologist to the presence of a
suspicious lesion."
Two more recent studies also demonstrated that visual inspection of the
cervix can be helpful in reducing referrals for colposcopy without compromising quality of
care (Frisch, Milner and Ferris 1994; Slawson, Bennett and Herman 1992). For example,
Slawson et al found that among women who eventually had an abnormal biopsy, VIA detected
disease in approximately 64% of such cases, a very similar rate to what they found for the
Pap smear (68%). In addition, as the investigator became more experienced, positive
predictive value improved by almost 30%. Thus they concluded that "[VIA] is a
safe, simple and effective adjunct to the Papanicolaou smear for cervical cancer
screening." Likewise, Frisch et al discovered that using VIA as an adjunct to
cytology improved both the number of dysplastic lesions found as well as the negative
predictive value of cytology (that is, if the Pap smear and the visual inspection both
were normal, colposcopy and biopsy were also more likely to be normal than if just
a Pap smear was performed).
Visual Inspection as an Alternative to Cytology in Low-Resource Settings
Even though the studies described above all contributed to demonstrating
the potential value of visual inspection of the cervix as a screening approach,
evidence from more rigorous scientific studies was needed before clinicians would accept
visual inspection as an alternative to cytology as a primary screening
approacheven in settings where Pap smear-based services are not possible (Franco and
Monsonego 1997).
To this end, the World Health Organization (WHO) supported a study in
India between 1988 and 1991 in which unmagnified visual inspection with acetic acid
washing was evaluated as a "downstaging" technique.4
The results of this study showed VIA to be effective in identifying women with cancer
at an earlier, more treatable stage (Singh, Sehgal and Luthra 1992). In 1994 another study
was conducted in South Africa involving visual screening and Pap smears, performed in a
mobile unit equipped to process smears on site. A gynecologist performed colposcopy to
confirm disease in the mobile unit either immediately or within a couple of days after
screening. The positive predictive value for VIA was found in this investigation to be
similar to that of the Pap smear and the authors thus concluded that "naked-eye
visualization of the cervix after application of diluted acetic acid . . . warrants
consideration as an alternative to cytologic screening" (Megevand et al 1996).
Finally, in a recent 1997 publication, Franco and Monsonego described their experiences
with women who had reported to an early cancer detection center in India for opportunistic
cervical cytology and agreed to participate in a study to evaluate unaided visual
inspection, cervicoscopy and cytology (Franco and Monsonego 1997). Preliminary results of
this study indicated that, compared to cytology, VIA was more sensitive in detecting
lesions although the difference was not statistically significant. In this study, however,
the specificity of cytology was statistically significantly higher than that of VIA.
Finally, the findings or preliminary results of four recent or ongoing
studies on visual inspection in Indonesia, Kenya, Zimbabwe and South Africa5
provide supportive additional information. These studies seek to answer the basic research
question: "What are the test qualities of visual inspection as a primary screening
modality?" Most of these studies also address the more specific question of whether
visual inspection is "acceptably" effective in distinguishing diseased from
nondiseased persons in a particular healthcare setting by comparing the test qualities of
visual inspection with other screening tests (e.g., Pap smears) performed under the same
conditions. While it is too early to draw conclusions from ongoing studies, preliminary
or final results from the comparative studies suggest that visual inspection with acetic
acid performs comparably to the Pap smear and/or other screening tests being investigated
in those settings. Once the two ongoing studies are completed, these results should
provide the additional evidence needed to support clinicians in their decisions regarding
the use of visual inspection as a primary screening approach.
Efficacy of Cryotherapy and Loop Electrosurgical Excision
Procedure
For cervical cancer screening programs to be effective and ethical,
appropriate treatment must be both available and affordable to those who test positive for
disease. The treatment options generally suggested for precancerous lesions are
cryotherapy and LEEP. A situation analysis report describing the comparative advantages
and disadvantages of treatment options noted that the effectiveness of both methods (as
revealed in numerous research studies) is high, 8095% (Bishop, Sherris and Tsu
1995).
The results of a survey of therapies currently used in developing
countries to manage cervical intraepithelial neoplasia (CIN) are also reported in the
situation analysis document. The survey revealed that hysterectomy and cone
biopsyboth of which involve hospital stays and are associated with significant
procedure-related costs and risksare commonly used methods, despite available
scientific evidence that supports both LEEP and cryotherapy as effective outpatient
treatment modalities. The use of methods that are more costly and potentially more risky
to the patient (e.g., hysterectomy) is due in part to a tendency towards medicalization of
healthcare and also to the fact that in some countries screening is not routinely offered
at levels of the health system where outpatient treatment such as LEEP and cryotherapy
could be made available.
Managing Precancerous Disease
The recommended management approach is based on the principle that
screening and treatment can take place during the same visit and, further, that screening
and immediate treatment can take place at the lowest possible level of the health system
(where the majority of at-risk women will go at least once in their lives). Given that the
healthcare provider most often posted to such levels is a nurse or nurse-midwife, this
approach assumes that both screening and treatment can be performed competently by these
or similar cadres of health personnel. A major advantage of managing precancerous disease
using this approach is that it offers a potential solution to the problem of
loss-to-followup that occurs as a consequence of the need to wait for cytology-based
screening results (Pap smear processing and return of results) as well as the need, which
often occurs, to go to a different facility for treatment.
Treating Women with Unconfirmed Disease
Results reported to date pertaining to the specificity of visual
inspection from test quality studies suggest that providers might offer treatment
to a number of women when, in fact, no disease is clinically detectable. In turn, a
significant number of these women might decide to be treated. This
"overtreatment" translates into unnecessary costs to the healthcare system as
well as unnecessary discomfort and potential side effects experienced by the women. In a
resource-limited environment, however, patients are unlikely ever to receive a diagnosis
confirming their "true" disease state. In such settings, treatment for suspicious
precancerous lesions might in some cases be "treatment" for subclinical
disease likely to exist in women determined to be at high risk for disease. Speculation
about some level of preventive effect is based on what is known about the natural history
of cervical cancer. Treatment with cryotherapy potentially may reduce the probability of
developing cancer or precancerous lesions in women at risk of the disease for at least 5
to 10 years (Lonky et al 1997). If a decision to treat suspicious lesions is made,
cryotherapy, cold coagulation or electrocautery are the least expensive and least
traumatic procedures. Also, because these methods are noninvasive, unlike LEEP which
involves actual removal of tissue, they can be provided at the lowest possible level of
the health system by nonphysicians.
1 "DALYs are a measure of life years
gained that combine the number of years of healthy life lost due to both premature
morbidity and mortality, using a set of age- and disability-estimated weights" (PATH
1997).
2 In general, the World Bank
suggests that any intervention whose cost is less than $100 per DALY gained is worth
investing in as a substantially cost-effective public health program (World Bank 1993).
3 The results of this
preliminary studyinvolving 309 sexually active patients using cytology and
occasional histology as a gold standardrevealed a sensitivity of 87% and a
specificity of 84%. A false negative rate of 12.6% represents a decided improvement over
the 1540% false negative rate that has persisted with cytology alone during the past
10 years. The false positive rate was 16% (Abrams 1990).
4 "Downstaging" is
the systematic attempt to find cancer cases at ever lower levels of severity. Using such
an approach, over time, the proportion of patients whose disease is discovered when it is
still curable should increase and the proportion of incurable cases should, in turn,
decrease.
5 See "Visual Inspection
for Cervical Dysplasia: Preliminary Evaluation Studies in Indonesia
(19921994)," "Cervical Cancer Screening in Women Attending a Family
Planning Clinic in Nairobi, Kenya," "Zimbabwe Cervical Cancer Screening Study,
and "Cape Town Study: South Africa" in Gaffikin L et al (eds). 1997.
Alternatives for Cervical Cancer Screening and Treatment in Low-Resource Settings.
JHPIEGO Corporation: Baltimore, Maryland. A Report of the Proceedings of the JHPIEGO Board
of Trustees Workshop held 2122 May 1997.
The following recommendations were derived from the various plenary
discussions held during the 2-day workshop.
- If morbidity and mortality due to cancer of the cervix are to be measurably reduced,
cervical cancer screening and treatment programs must be implemented for at-risk
women on a national or large-scale basis.
- The test qualities of visual inspection have proven to be reasonably consistent across
the various investigative studies to date, including those for which only preliminary data
are currently available. Once ongoing studies are completed, efforts should shift to
investigating how visual inspection performs in the field under more routine health
delivery (versus field research) conditions, and how the benefits of such visual
inspection-based screening programs could outweigh program limitations, including the
potential for overtreatment.
- In addition to documenting further the efficacy and safety of visual inspection under
different field conditions, such applied research projects should answer important
questions related to the practicality, feasibility and, most important, the acceptability
of visual inspection-based screening programs among the target population.
Large-scale visual inspection-based screening programs should have the
following characteristics:
- As a primary means of screening, the use of visual inspection should enable the largest
proportion of at-risk women to be screened at least once during their lives,
preferably more frequently, if feasible.
In countries where cytology programs are well established and functioning in at least
part of the public sector, visual inspection could be used as an adjunct to cytology or as
the primary means of screening, if desired, to reduce program-related costs. Confirmation
of disease as well as treatment should take place at whichever level of the health system
supports the least loss-to-followup, balanced by appropriate treatment.
In countries where cytology programs exist only in the private sector, visual inspection
could be considered the primary screening method in the public sectorwith referral
for diagnostic testing, if practical, or treatment on the spot if significant
loss-to-followup is likely.
In countries where, in effect, no screening exists, visual inspection may
be the only feasible option for screening for precancerous lesions. Practical ways to
increase sensitivity and specificity of this test need to be investigated. This could
include, for example, repeat testing over time or treatment protocols that target women
most likely to be diseased, given a positive screening test (e.g., women with higher
parity and/or women over age 30). In such settings, treatment would need to be on-the-spot
or close enough in time and proximity to limit loss-to-followup.
Working Group Recommendations
Specific recommendations in the areas of screening, treatment and
programming were developed by small working groups during the afternoon of Day 2. Key
points from those groups, presented in the final plenary meeting, are summarized below.
Screening
- The gold standard in any studies to document further the test qualities
of visual inspection should be colposcopy at a minimum, biopsy wherever possible.
- Standardization of what constitutes visual inspection "test
positive" is critical. At a minimum, the threshold of test positive should be
acetowhite change. More exact definitions and teaching aids will improve or maintain
acceptable test qualities in the field.
- The threshold defining who is "diseased" (e.g., high- or
low-grade lesions) and thus who should be treated should reflect the epidemiology of
disease in that country. In unscreened populations, diseased women constitute prevalent
cases. In such settings, treating all cases of precancerous lesions might result in a
greater immediate programmatic impact. On the other hand, in screened
populationswhere diseased cases are new (incident) onestreatment should be
targeted at high-grade lesions most likely to progress.
- A test with 60% sensitivity or above should be considered a viable
screening option for picking up cases of disease in settings where the current screening
option has comparable or similar sensitivity, or no screening option exists.
- A screening test should have a specificity of 70% or above to be
considered a viable option for correctly identifying those without disease if cryotherapy
is used as the treatment modality. Higher specificity is recommended for situations in
which LEEP is used to treat precancerous lesions.
Treatment
- Additional research is needed on the natural history of disease or
disease progression in the presence of various cofactors (in particular HIV).
- Further studies (including examination of treatment failure rates among
HIV-positive women) need to be conducted to determine the most appropriate treatment
modality in countries where HIV prevalence is high.
- The role of cold coagulation and electrocautery as treatment options
should be further investigated.
- Appropriate counseling is critical as a means of informing women about
their screening results and of assisting them in deciding what further
actionincluding treatmentthey should take.
- Based on the results of what is likely to be an imperfect screening test,
the woman, together with her provider, should decide whether or not to treat. This
decision should be consistent with national policy, which dictates how public healthcare
funds are spent.
- The projected cost to the health system of potentially overtreating some
women should be balanced against costs currently incurred by the system in treating women
with more advanced disease (which requires more expensive treatment modalities).
- The projected "cost" to a woman (and her family) of potentially
overtreating her when no disease is present should be balanced against the potential
benefit a woman might perceive she has gained from being protected from advanced
(clinical) disease for at least 5 to 10 years.
Programming
- A priority for cervical cancer programs should include primary prevention
aimed at reducing the risk of acquiring human papillomavirus (HPV) and developing
precancerous lesions (e.g., reduced parity through family planning, safer sexual practices
to reduce sexually transmitted diseases [STDs] through information, education and
communication [IEC] and condom promotion).
- Health policy- and decision-makers and providers need to be sensitized
about the new data regarding screening and treatment options and encouraged to develop
context-specific plans to integrate these options into existing cervical cancer programs.
- Health delivery settingsin which offering cervical cancer screening
and treatment would be most advantageous to women and the health program as a
wholeneed to be identified.
- Ways of integrating cervical cancer screening and treatment services into
existing womens health services are critical in resource-limited environments.
Abrams J. 1990. A preliminary study of the Gynoscope: An adjunct to
cytologic screening of the cervix. The American Journal of Gynecologic Health 4(1):
3743.
Bishop A, J Sherris and V Tsu. 1995. Cervical Dysplasia Treatment in
Developing Countries: A Situation Analysis. PATH: Seattle, Washington.
Franco E and J Monsonego (eds). 1997. New Developments in Cervical
Cancer Screening and Prevention. Blackwell Science Ltd: Oxford, United Kingdom.
Frisch LE, FH Milner and DG Ferris. 1994. Naked-eye inspection of the
cervix after acetic acid application may improve the predictive value of negative
cytologic screening. Journal of Family Practice 39(5): 457460.
Jamison DT et al (eds). 1993. Disease Control Priorities in
Developing Countries. Oxford University Press: New York, New York.
Judson FN. 1992. Interactions between human papillomavirus and human
immunodeficiency virus infections. International Agency for Research on Cancer. Scientific
Publications 119: 199207.
Koss LG. 1989. The Papanicolaou test for cervical cancer detection. A
triumph and a tragedy. Journal of the American Medical Association 261(5):
737743.
Lonky NM et al. 1997. Selecting treatments for cervical disease. (Part
2). OBG Management (January): 6070.
Megevand E et al. 1996. Acetic acid visualization of the cervix: An
alternative to cytologic screening. Obstetrics & Gynecology. 88(3):
383386.
Ottaviano M and P La Torre. 1982. Examination of the cervix with the
naked eye using acetic acid test. American Journal of Obstetrics and Gynecology
143(2): 139142.
Parkin DM, P Pisani and J Ferlay. 1993. Estimates of the worldwide
incidence of eighteen major cancers in 1985. International Journal of Cancer 54:
594606.
Program for Appropriate Technology in Health (PATH). 1997. Planning
Appropriate Cervical Cancer Control Programs. PATH: Seattle, Washington.
Singh V, A Sehgal and UK Luthra. 1992. Screening for cervical cancer by
direct inspection. British Medical Journal 304: 534535.
Slawson DC, JH Bennett and JM Herman. 1992. Are Papanicolaou smears
enough? Acetic acid washes of the cervix as adjunctive therapy: A HARNET study. Harrisburg
Area Research Network. Journal of Family Practice 35(3): 271277.
World Bank. 1993. World Development Report 1993: Investing in Health.
Oxford University Press: New York, New York.
World Health Organization (WHO). 1986. Control of cancer of the cervix
uteri. A WHO meeting. Bulletin of the World Health Organization 64(4):
607618.
Abdul Bari Saifuddin, MD*
Paul Blumenthal, MD, MPH
Sylvia Bomfim-Hyppólito, MD*
Susan J Griffey Brechin, DrPH, BSN
Jean-Robert Brutus, MD, MPH*
Charles Carignan, MD
Patricia Claeys, MD, MPH
Lynne Gaffikin, DrPH
Douglas Huber, MD, MSc
Carlos Huezo, MD
Edna Jonas, MPH, BSN
Rama Lakshminarayanan, MD
William Lawrence, MD, MS
Robert JI Leke, MD*
Kobchitt Limpaphayom, MD*
Noel McIntosh, MD, ScD
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Winnie Mpanju-Shumbusho, MD, MPH, MMED
Saloney Nazeer, MD
Kevin OReilly, MD
Lydia Palaypay, BSN, MSN*
Harshad Sanghvi, MD
Keerti Shah, MD
Jim Shelton, MD, MPH
Jacqueline Sherris, PhD
Diljeet Singh, MD, MPH
Jeff Spieler, MS
Karen Stein, MD, MPH
Richard Szumel, MD
Vivien Tsu, PhD, MPH
Christiane Welffens-Ekra, MD*
Tom Wright, MD |
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