1. Department of Psychiatry and Human Behavior, Charles Drew University of Medicine and Science, Los Angeles, CA, USA;
2. University of Cape Town, Cape Town, South Africa;
3. Anova Health Institute, Johannesburg, South Africa;
4. University of California Irvine, Irvine, CA, USA;
5. Center for AIDS Prevention Science, UCSF, San Francisco, CA, USA;
6. UCLA Center for World Health at the David Geffen School of Medicine, Los Angeles, CA, USA