1. Division of Gastroenterology and Hepatology; Department of Internal Medicine; Kaohsiung Veterans General Hospital; Kaohsiung Taiwan
2. School of Medicine; National Yang-Ming University; Taipei Taiwan
3. Center for Medical Informatics and Statistics; Kaohsiung Medical University; Kaohsiung Taiwan
4. Division of Hepato-Gastroenterology; Department of Internal Medicine; Kaohsiung Chang Gung Memorial Hospital; Kaohsiung Taiwan
5. College of Medicine; Chang Gung University; Kaohsiung Taiwan
6. Division of Gastroenterology; Department of Internal Medicine; Kaohsiung Medical University Hospital and Kaohsiung Medical University; Kaohsiung Taiwan