Masemola AM, Mashishi TN, Khoury G, Bredell H, Paximadas M, Mathebula T, Barkhan D, Puren A, Vardas E, Colvin M, Zijenah L, Katzenstein D, Musonda R, Allen S, Kumwenda N, Taha T, Gray G, McIntyre J, Abdool Karim S , Sheppard HW, Gray CM, and the HIVNET 028 Study team.