1. Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
2. Division of Gastroenterology, Department of Internal Medicine, Nantou Hospital, Ministry of Health and Welfare, Taipei, Taiwan
3. Division of Allergy, Immunology and Rheumatology, Department of Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan
4. Graduate Institute of Integrated Medicine, China Medical University, Taichung, Taiwan
5. Department of Healthcare Administration, Central Taiwan University of Science and Technology, Taichung, Taiwan
6. Division of Gastroenterology, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan