1. Division of Gastroenterology and Hepatology, Department of Medicine, Kaohsiung Veterans General Hospital, Kaohsiung, Taiwan; School of Medicine, National Yang-Ming University, Taipei, Taiwan
2. Division of Gastroenterology and Hepatology, Department of Medicine, Ping Tung Christian Hospital, Ping Tung, Taiwan; Department of Nursing, Meiho University, Taiwan
3. School of Medical Sciences, Universiti Sains Malaysia, Kota Bharu, Malaysia
4. Gut Research Group, Faculty of Medicine, The National University of Malaysia, Kuala Lumpur, Malaysia