1. Department of Pediatrics; Faculty of Medicine; Chulalongkorn University; Bangkok; Thailand
2. The HIV Netherlands Australia Thailand Research Collaboration (HIV-NAT); Bangkok; Thailand
3. Department of Pediatrics; Phramongkutklao Hospital and College of Medicine; Bangkok; Thailand
4. Department of Pediatrics; Khon Kaen University; Khon Kaen; Thailand
5. Department of Pediatrics; Siriraj Hospital; Mahidol University; Bangkok; Thailand
6. Department of Pediatrics; Ramathibodi Hospital; Mahidol University; Bangkok; Thailand
7. Department of Medicine; Faculty of Medicine; Chulalongkorn University; Bangkok; Thailand
8. Department of Medicine; Ramathibodi Hospital; Mahidol University; Bangkok; Thailand