[1] Univ KwaZulu Natal, Sch Nursing & Publ Hlth, Dept Publ Hlth Med, ZA-4001 Durban, South Africa
[2] Univ Rwanda, Coll Med & Hlth Sci, POB 3286, Kigali, Rwanda
[3] Columbia Univ, ICAP, Mailman Sch Publ Hlth, Kigali 2807, Rwanda
[4] CIHR Canadian HIV Trials Network, Vancouver, BC V6Z 1Y6, Canada
[5] Univ Limpopo, Dept Publ Hlth, ZA-0727 Polokwane, Limpopo, South Africa