1. Division of Gastroenterology and Hepatology, Department of Internal Medicine An Nan Hospital, China Medical University Tainan Taiwan
2. Department of Internal Medicine Kaohsiung Veterans General Hospital and National Yang‐Ming University Kaohsiung Taiwan
3. Department of Internal Medicine, Division of Gastroenterology Michigan Medicine, University of Michigan Ann Arbor Michigan USA
4. Department of Nuclear Medicine Kaohsiung Veterans General Hospital and National Yang‐Ming University Kaohsiung Taiwan
5. Department of Medical Education and Research Kaohsiung Veterans General Hospital Kaohsiung Taiwan
6. Division of Gastroenterology, Department of Internal Medicine Kaohsiung Municipal Siaogang Hospital Kaohsiung Taiwan
7. Division of Gastroenterology, Department of Internal Medicine Kaohsiung Municipal Siaogang Hospital Kaohsiung Taiwan