1. Department of Internal Medicine, Division of Gastroenterology and Hepatology, Chi-Mei Medical Center, Tainan, Taiwan
2. Department of Public Health and Institute of Public Health, Chung Shan Medical University, Taichung, Taiwan
3. Department of Physical Education, Fu-Jen Catholic University, New Taipei, Taiwan
4. Department of Family and Community Medicine, Chung Shan Medical University Hospital, Taichung, Taiwan