[1] Division of Gastroenterology and Hepatology, Department of Internal Medicine, Faculty of Medicine, Prince of Songkla University, Hatyai, Songkhla
[2] NKC Institute of Gastroenterology and Hepatology, Songklanagarind Hospital, Prince of Songkla University, Hatyai, Songkhla
[3] Research Unit of Holistic Health and Safety Management in Community, Faculty of Medicine, Prince of Songkla University, Songkhla