About the Authors

Lawrence C. Long

llong@heroza.org

Affiliations Department of Internal Medical, School of Clinical Medicine, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa, School of Public Health, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa, Health Economics and Epidemiology Research Office, Wits Health Consortium, Johannesburg, South Africa

Matthew P. Fox

Affiliations Department of Internal Medical, School of Clinical Medicine, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa, School of Public Health, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa, Health Economics and Epidemiology Research Office, Wits Health Consortium, Johannesburg, South Africa, Center for Global Health & Development, Boston University, Boston, Massachusetts, United States of America, Department of Epidemiology, Boston University School of Public Health, Boston, Massachusetts, United States of America

Celeste Sauls

Affiliations Department of Internal Medical, School of Clinical Medicine, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa, Health Economics and Epidemiology Research Office, Wits Health Consortium, Johannesburg, South Africa

Denise Evans

Affiliations Department of Internal Medical, School of Clinical Medicine, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa, School of Public Health, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa, Health Economics and Epidemiology Research Office, Wits Health Consortium, Johannesburg, South Africa

Ian Sanne

Affiliations Department of Internal Medical, School of Clinical Medicine, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa, School of Public Health, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa, Health Economics and Epidemiology Research Office, Wits Health Consortium, Johannesburg, South Africa, Center for Global Health & Development, Boston University, Boston, Massachusetts, United States of America

Sydney B. Rosen

Affiliations Department of Internal Medical, School of Clinical Medicine, Faculty of Health Sciences, University of Witwatersrand, Johannesburg, South Africa, Health Economics and Epidemiology Research Office, Wits Health Consortium, Johannesburg, South Africa, Center for Global Health & Development, Boston University, Boston, Massachusetts, United States of America

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: LCL SBR. Performed the experiments: LCL CS. Analyzed the data: LCL MPF SBR. Contributed reagents/materials/analysis tools: LCL MPF CS DE IS SBR. Wrote the paper: LCL MPF CS DE IS SBR. Technical and clinical oversight: DE IS.