Affiliation: | (1) Division of Gastroenterology and Hepatology, Department of Internal Medicine, Tri-Service General Hospital, National Defense Medical Center, Taipei, 114, Taiwan, R.O.C.;(2) Division of Gastroenterology and Hepatology, Tri-Service General Hospital, No. 325, Section 2, Cheng-Kung Road, Taipei, 114, Taiwan, R.O.C. |