1. Department of Epidemiology; Johns Hopkins Bloomberg School of Public Health; Baltimore MD USA
2. Department of Pediatrics; Faculty of Medicine; Chiang Mai University; Chiang Mai Thailand
3. HIV-NAT; The Thai Red Cross AIDS Research Centre; Bangkok Thailand
4. Research Institute for Health Sciences; Chiang Mai University; Chiang Mai Thailand
5. Srinagarind Hospital; Khon Kaen University; Khon Kaen Thailand
6. Department of Child Health; Cipto Mangunkusumo General Hospital; Jakarta Indonesia
7. TREAT Asia/amfAR - The Foundation of AIDS Research; Bangkok Thailand
8. The U.S. Military HIV Research Program; The Henry M. Jackson Foundation for the Advancement of Military Medicine; Bethesda MD USA
9. Department of Pediatrics; Faculty of Medicine; Chulalongkorn University; Bangkok Thailand