1. Institute of Pharmacology; National Yang-Ming University; Taipei Taiwan
2. Faculty of Medicine; National Yang-Ming University; Taipei Taiwan
3. Division of Gastroenterology; Department of Medicine; Taipei Veterans General Hospital; Taipei Taiwan
4. Department of Medical Affair and Planning; Taipei Veterans General Hospital; Taipei Taiwan
5. Division of General Medicine; Taipei Veterans General Hospital; Taipei Taiwan
6. Division of Gastroenterology; Department of Medicine; Cheng Hsin General Hospital; Taipei Taiwan