1. Division of Gastroenterology & Hepatology; Taichung Veterans General Hospital; Taichung Taiwan
2. Department of Medicine; Chung Shan Medical University; Taichung Taiwan
3. School of Medicine; Fu Jen Catholic University; New Taipei City Taiwan
4. Department of Internal Medicine; E-Da Hospital/I-Shou University; Kaohsiung Taiwan
5. Center for Health Policy Research and Development; National Health Research Institutes; Miaoli Taiwan
6. Faculty of Medicine, School of Medicine; National Yang-Ming University; Taipei Taiwan
7. Department of Dermatology; Taichung Veterans General Hospital; Taichung Taiwan
8. Department of Internal Medicine; National Taiwan University Hospital; Taipei Taiwan
9. College of Public Health and Graduate Institute of Clinical Medical Science; China Medical University; Taichung Taiwan
10. Department of Life Sciences; National Chung-Hsing University; Taichung Taiwan