1. George Washington University School of Medicine and Health Sciences, Washington, DC, USA
2. Children’s National Hospital, Washington, DC, USA
3. Baylor College of Medicine, Children’s Foundation - Lesotho, Maseru, Lesotho
4. Baylor College of Medicine, Houston, TX, USA
5. Baylor College of Medicine, International Pediatric AIDS Initiative, Houston, TX. USA
6. Maine Medical Centre, Portland, Maine
7. Stanford University School of Medicine, Palo Alto, CA, USA