1. Department of Medicine, Yong Loo Lin School of Medicine; National University of Singapore; Singapore
2. Gleneagles Hospital; Singapore
3. Camden Medical Centre and Endocrinology Service, Department of Paediatric Medicine; KK Hospital; Singapore
4. Department of Gastroenterology and Hepatology; General Hospital; Singapore
5. Duke-NUS Medical School; Singapore
6. Department of Paediatrics Medicine, Yong Loo Lin School of Medicine; National University of Singapore; Singapore
7. Division of Gastroenterology and Hepatology; National University Health System; Singapore
8. Khoo Teck Puat-National University Children's Medical Institute; National University Health System; Singapore
9. Ipoh Gastro Centre; Ipoh Malaysia
10. Division of Gastroenterology and Hepatology, Department of Medicine; University of Malaya; Kuala Lumpur Malaysia
11. Unit of Gastroenterology and Hepatology, Department of Medicine; The National University of Malaysia Medical Centre, Cheras; Kuala Lumpur Malaysia
12. Nutrition and Dietetics; KK Women's and Children's Hospital; Singapore
13. Division of Gastroenterology, Department of Internal Medicine, Faculty of Medicine; University of Indonesia, Cipto Mangunkusumo Hospital; Jakarta Indonesia
14. Section of Gastroenterology; University of Santo Tomas Hospital; Manila Philippines
15. Department of Internal Medicine; Siriraj Hospital, Mahidol University; Bangkok Thailand
16. GI Motility Research Unit, Division of Gastroenterology, Department of Medicine Faculty of Medicine; Chulalongkorn University; Bangkok Thailand
17. School of Medical Sciences; University of Science Malaysia; Kota Bharu Kelantan Malaysia
18. Medical Center Manila; Manila Philippines
19. Klinik Pakar Y&C; Menglembu Perak Malaysia
20. Klnic Chong; Slim River Perak Malaysia
21. Hospital Fatimah; Ipoh Malaysia