1. Botswana-University of Pennsylvania Partnership; Gaborone Botswana
2. Department of Medicine; Hospital of the University of Pennsylvania; Philadelphia PA USA
3. Center for Pharmacoepidemiology Research and Training; University of Pennsylvania; Philadelphia PA USA
4. Drexel University School of Medicine; Philadelphia PA USA
5. Infectious Diseases (Pediatrics); Children's Hospital of Philadelphia; Philadelphia PA USA
6. Center for Clinical Epidemiology and Biostatistics; University of Pennsylvania; Philadelphia PA USA