1. Child Development Unit, Department of Pediatrics, Faculty of Medicine, Prince of Songkla University, Songkhla 90100, Thailand
2. Division of Nutrition, Department of Pediatrics, Chiang Mai University, Chiang Mai 50200, Thailand
3. Department of Obstetrics and Gynecology, Faculty of Medicine Vajira Hospital, Navamindradhiraj University, Bangkok 10300, Thailand