[1] Human Sci Res Council, HIV AIDS STIs & TB HAST Res Programme, Pretoria, South Africa
[2] Univ Miami, Ctr Prevent Implementat Methodol CePIM Drug Abuse, Miami, FL USA
[3] Univ Miami, Florida Node Alliance Natl Drug Abuse Treatment C, Miami, FL USA
[4] Univ Miami, Miller Sch Med, Dept Psychiat & Behav Sci, Miami, FL 33136 USA