1. Division of Gastroenterology; Wei Gong Memorial Hospital; Miaoli Taiwan
2. Faculty of Medicine; National Yang-Ming University School of Medicine; Taipei Taiwan
3. Department of Medicine; Taipei Veterans General Hospital; Taipei Taiwan
4. Queen of Angels Hospice; Arcadia California USA
5. Department of Biostatistics; UCLA; Los Angeles California USA
6. Institute of Clinical Medicine; National Yang-Ming University School of Medicine; Taipei Taiwan
7. Department of Radiology; Taipei Veterans General Hospital; Taipei Taiwan
8. Institute of Pharmacology; National Yang-Ming University School of Medicine; Taipei Taiwan