1. Division of Gastroenterology and Hepatology, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
2. Department of Internal Medicine, School of Medicine, College of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
3. Institute of Clinical Medicine, College of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan, ROC
4. Division of General Medicine, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
5. Division of Basic Research, Department of Medical Research, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
6. Institute of Pharmacology, National Yang Ming Chiao Tung University School of Medicine, Taipei, Taiwan, ROC