1. Division of Gastroenterology, Department of Internal Medicine, Ditmanson Medical Foundation, Chiayi Christian Hospital, Chiayi, Taiwan
2. Department of Pathology, Ditmanson Medical Foundation, Chiayi Christian Hospital, Chiayi, Taiwan
3. Department of Internal Medicine, Taichung Hospital, Ministry of Health and Welfare, Taichung, Taiwan
4. Department of Health Services Administration, China Medical University, Taichung, Taiwan
5. Department of Healthcare Administration, Central Taiwan University of Science and Technology, Taichung, Taiwan