1. Department of Paediatrics; Faculty of Medicine; Prince of Songkla University; Songkhla Thailand
2. Epidemiology Unit; Faculty of Medicine; Prince of Songkla University; Songkhla Thailand
3. Institute of Nutrition; Mahidol University; Phutthamonthon Nakhon Pathom Thailand
4. Thammasat Secondary School; Faculty of Learning Sciences and Education; Thammasat University; Pratumtani Thailand