1. Department of Pediatrics, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand.
2. HIV-NAT, Thai Red Cross AIDS Research Center, Bangkok, Thailand.
3. Social Health Clinic, Phnom Penh, Cambodia.
4. Chiangrai Prachanukroh Hospital, Chiang Rai, Thailand.
5. National Pediatric Hospital, Phnom Penh, Cambodia.
6. Nakornping Hospital, Chiang Mai, Thailand.
7. Prapokklao Hospital, Chantaburi, Thailand.
8. Bamrasnaradura Infectious Diseases Institute, Nonthaburi, Thailand.
9. Queen Savang Vadhana Memorial Hospital, Chonburi, Thailand.
10. Kirby Institute for Infection and Immunity in Society, University of New South Wales, Sydney, Australia.
11. Department of Medicine, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
12. Department of Pediatrics, Faculty of Medicine, Chulalongkorn Univiersity, Bangkok, Thailand.