1. Division of Gastroenterology & Hepatology, Department of Internal Medicine; Taichung Veterans General Hospital; Taichung Taiwan
2. Department of Medical Research; Taichung Veterans General Hospital; Taichung Taiwan
3. Division of Nephrology, Department of Internal Medicine; Taichung Veterans General Hospital; Taichung Taiwan
4. Faculty of Medicine, College of Medicine; National Yang-Ming University; Taipei Taiwan
5. School of Medicine; Chung Shan Medical University; Taichung Taiwan