Reply to Van de Wijer et al

Affiliations

• ¹ Gertrude H. Sergievsky Center, College of Physicians and Surgeons, Columbia University, New York, New York.
• ² Center for AIDS Prevention Studies, Department of Medicine, University of California, San Francisco.
• ³ Empilweni Services and Research Unit, Rahima Moosa Mother and Child Hospital, Department of Paediatrics and Child Health, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa.
• ⁴ Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, New York.
• ⁵ Centre for HIV and STIs, National Institute for Communicable Diseases, Johannesburg, South Africa.
• ⁶ ICAP, Mailman School of Public Health.
• ⁷ Department of Pediatrics, College of Physicians and Surgeons, Columbia University, New York, New York.