1. Division of Ambulatory Pediatrics (Adolescent Medicine), Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
2. Department of Pediatrics, Faculty of Medicine, Prince of Songkhla University, Songkhla, Thailand
3. Division of Neurology, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
4. Division of Nutrition, Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
5. Department of Preventive and Social Medicine, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
6. Bureau of Epidemiology, Department of Disease Control, Ministry of Public Health, Nonthaburi, Thailand
7. Division of Ambulatory Pediatrics (Toxicology), Department of Pediatrics, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand