1. Graduate Institute of Clinical Medicine, College of Medicine Kaohsiung Medical University Kaohsiung Taiwan
2. Division of Gastroenterology, Department of Internal Medicine Kaohsiung Medical University Hospital Kaohsiung Taiwan
3. School of Medicine, College of Medicine Kaohsiung Medical University Kaohsiung Taiwan
4. Department of Gastroenterology and Hepatology New Taipei Municipal TuCheng Hospital and Chang Gung University New Taipei City Taiwan
5. Department of Internal Medicine Kaohsiung Municipal Siaogang Hospital Kaohsiung Taiwan
6. Department of Internal Medicine Far Eastern Memorial Hospital New Taipei City Taiwan
7. Department of Internal Medicine, National Taiwan University Hospital National Taiwan University, College of Medicine Taipei Taiwan
8. Department of Internal Medicine Ditmanson Medical Foundation Chia‐Yi Christian Hospital Chia‐Yi Taiwan
9. Division of Gastroenterology, Department of Internal Medicine, Tri‐Service General Hospital National Defense Medical Center Taipei Taiwan