1. Division of Gastroenterology; Department of Internal Medicine; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
2. Faculty of Medicine; Department of Medicine; College of Medicine; Kaohsiung Medical University; Kaohsiung Taiwan
3. Department of Public Health; Kaohsiung Medical University; Kaohsiung Taiwan
4. Department of Family Medicine; Kaohsiung Medical University Hospital; Kaohsiung Taiwan
5. Graduate Institute of Clinical Medicine; College of Medicine; Kaohsiung Medical University; Kaohsiung Taiwan