[1] Natl Inst Communicable Dis, Ctr HIV & STIs, Johannesburg, South Africa
[2] Uganda Virus Res Inst, Entebbe, Uganda
[3] Int AIDS Vaccine Initiat, Faridabad, India
[4] Univ Witwatersrand, Johannesburg, South Africa
[5] Neutralising Antibody Ctr, Int AIDS Vaccine Initiat, San Diego, CA USA
[6] Rwanda Zambia Hlth Res Grp, Kigali, Rwanda
[7] Zambia Emory HIV Res Project, Lusaka, Zambia
[8] Univ KwaZulu Natal, Durban, South Africa