1. Médecins Sans Frontières, Phnom Penh, Cambodia
2. Pediatrics Department, Donkeo Referral Hospital, Ministry of Health, Takeo, Cambodia
3. Angkor Hospital for Children, Siem Reap, Cambodia
4. HIV/Hepatitis Laboratory, Pasteur Institute of Cambodia
5. Médecins Sans Frontières, Operational Research Unit, Brussels, Belgium