1. Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan (L.C.C., C.C.C., M.J.C., M.S.W., H.M.C.)
2. Department of Internal Medicine, Fu Jen Catholic University Hospital, New Taipei, Taiwan (C.Y.Chang)
3. Department of Internal Medicine, Chia-Yi Christian Hospital, Chia-Yi, Taiwan (C.Y.Chen, C.K.C., P.Y.C.)
4. Department of Gastroenterology and Hepatology, E-DA Hospital, and Department of Gastroenterology and Hepatology, E-DA Cancer Hospital, Kaohsiung, Taiwan (C.H.Tseng)
5. Division of Gastroenterology, Tri-Service General Hospital, Taipei, Taiwan (P.J.C., T.Y.H.)
6. Department of Pathology, National Taiwan University Hospital, Taipei, Taiwan (C.T.S.)
7. Department of Internal Medicine, National Taiwan University Hospital, Hsin-Chu Branch, Hsin-Chu, and Department of Internal Medicine, National Taiwan University Cancer Center, Taipei, Taiwan (W.F.H., Y.N.C.)
8. Department of Internal Medicine and Health Management Center, National Taiwan University Hospital, Taipei, Taiwan (C.H.Tu)
9. Department of Gastroenterology and Hepatology, E-DA Hospital, and Department of Gastroenterology and Hepatology, I-Shou University, Kaohsiung, Taiwan (C.T.L.).