1. Division of Gastroenterology and Hepatology Department of Internal Medicine An Nan HospitalChina Medical University Tainan Taiwan
2. Kaohsiung Veterans General Hospital and National Yang‐Ming University Kaohsiung Taiwan
3. Division of Gastroenterology Department of Internal Medicine Michigan Medicine University of Michigan Ann Arbor Michigan USA
4. Department of Nuclear Medicine Taipei Veterans General Hospital and National Yang‐Ming University Taipei Taiwan
5. Division of Gastroenterology Department of Internal Medicine Kaohsiung Medical University HospitalKaohsiung Medical University Kaohsiung Taiwan
6. Division of Gastroenterology Department of Internal Medicine Kaohsiung Municipal Siaogang Hospital Kaohsiung Taiwan
7. Department of Internal Medicine Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine Kaohsiung Taiwan