About the Authors

Cynthia Firnhaber

cindy.firnhaber@righttocare.org

Affiliations Faculty of Health Science Centre, Department of Medicine, University of Witwatersrand, Johannesburg, South Africa, Right to Care, Johannesburg, South Africa

Nomtha Mayisela

Affiliation Right to Care, Johannesburg, South Africa

Lu Mao

Affiliation Department of Biostatistics, University of North Carolina, Gillings School of Global Public Health, Chapel Hill, North Carolina, United States of America

Sophie Williams

Affiliation Right to Care, Johannesburg, South Africa

Avril Swarts

Affiliation Faculty of Health Science Centre, Department of Medicine, University of Witwatersrand, Johannesburg, South Africa

Mark Faesen

Affiliation Right to Care, Johannesburg, South Africa

Simon Levin

Affiliations Right to Care, Johannesburg, South Africa, Department of OB/GYN, Coronation Hospital, University of Witwatersrand, Johannesburg, South Africa

Pam Michelow

Affiliation Cytology Unit Departments of Anatomical Pathology, Faculty of Health Science, University of Witwatersrand and National Health Laboratory Service and Department of Pathology, Johannesburg, South Africa

Tanvier Omar

Affiliation Cytology Unit Departments of Anatomical Pathology, Faculty of Health Science, University of Witwatersrand and National Health Laboratory Service and Department of Pathology, Johannesburg, South Africa

Michael G. Hudgens

Affiliation Department of Biostatistics, University of North Carolina, Gillings School of Global Public Health, Chapel Hill, North Carolina, United States of America

Anna-Lise Williamson

Affiliations Institute of Infectious Disease and Division of Medical Virology Department of Clinical Laboratory Sciences University of Cape Town, Cape Town, South Africa, National Health Laboratory Service, Groote Schuur Hospital, Cape Town, South Africa

Bruce Allan

Affiliation Institute of Infectious Disease and Division of Medical Virology Department of Clinical Laboratory Sciences University of Cape Town, Cape Town, South Africa

David A. Lewis

Affiliations Faculty of Health Science Centre, Department of Medicine, University of Witwatersrand, Johannesburg, South Africa, Centre for HIV and Sexually Transmitted Infections, National Institute for Communicable Diseases National Health Laboratory Services, Johannesburg, South Africa

Jennifer S. Smith

Affiliations Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina Chapel Hill, North Carolina, United States of America, Lineberger Comprehensive Cancer Centre, University of North Carolina, Chapel Hill, North Carolina, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CF SW AS MF SL PM TO JSS. Performed the experiments: CF SW NM MF SL PM TO ALW BA. Analyzed the data: CF AS SL PM MH LM DAL JSS. Contributed reagents/materials/analysis tools: BA ALW PM TO. Wrote the paper: CF JSS DAL MH PM LM.