About the Authors

Annelies Van Rie

Vanrie@email.unc.edu

Affiliation Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America

Kate Clouse

Affiliation Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America

Colleen Hanrahan

Affiliation Department of Epidemiology, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, United States of America

Katerina Selibas

Affiliation Clinical HIV Research Unit, University of the Witwatersrand, Johannesburg, South Africa

Ian Sanne

Affiliation Clinical HIV Research Unit, University of the Witwatersrand, Johannesburg, South Africa

Sharon Williams

Affiliation National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America

Peter Kim

Affiliation National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America

Jean Bassett

Affiliation Witkoppen Health and Welfare Center, Johannesburg, South Africa

Competing Interests

The authors have declared that no competing interest exists.

Author Contributions

Conceived and designed the experiments: AVR PK SW IS JB. Performed the experiments: JB KC CH KS. Analyzed the data: KC AVR CH. Wrote the paper: AVR KC CH JB PK. Collected data: KS CH.