1. Faculty of Medicine; National Yang-Ming University School of Medicine; Taipei Taiwan
2. Institute of Pharmacology; National Yang-Ming University School of Medicine; Taipei Taiwan
3. Division of Gastroenterology; Taipei Veterans General Hospital; Taipei Taiwan
4. National Yang-Ming University Hospital; Yilan Taiwan
5. Department of Medical Affair and Planning; Taipei Veterans General Hospital; Taipei Taiwan
6. Endoscopy Center for Diagnosis and Treatment; Taipei Veterans General Hospital; Taipei Taiwan
7. General Medicine, Department of Medicine; Taipei Veterans General Hospital; Taipei Taiwan
8. Division of Gastroenterology, Department of Medicine; Cheng Hsin General Hospital; Taipei Taiwan