1. School of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan
2. Division of Gastroenterology and Hepatology, Department of Internal Medicine, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
3. Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan
4. Department of Urology, Chung Shan Medical University Hospital, Taichung 40201, Taiwan