[1] Natl Yang Ming Univ, Sch Med, Dept Med, Taipei, Taiwan
[2] Taipei Vet Gen Hosp, Div Gastroenterol, Taipei, Taiwan
[3] Natl Yang Ming Univ, Sch Med, Inst Pharmacol, Taipei, Taiwan
[4] Taipei Vet Gen Hosp, Dept Med, Endoscop Ctr Diag & Therapy, Taipei, Taiwan
[5] Taipei Vet Gen Hosp, Healthcare & Management Ctr, Taipei, Taiwan