[1] Kaohsiung Chang Gung Mem Hosp, Dept Internal Med, Div Hepatogastroenterol, Kaohsiung 833, Taiwan
[2] Natl Taiwan Univ Hosp, Dept Internal Med, Taipei, Taiwan
[3] Natl Taiwan Univ, Coll Med, Taipei 10764, Taiwan
[4] Changhua Christian Hosp, Dept Internal Med, Changhua, Taiwan
[5] Taichung Vet Gen Hosp, Dept Internal Med, Taichung, Taiwan
[6] Natl Cheng Kung Univ Hosp, Dept Internal Med, Tainan, Taiwan
[7] China Med Univ Hosp, Dept Internal Med, Div Gastroenterol, Taichung, Taiwan
[8] Buddhist Tzu Chi Gen Hosp, Dept Gastroenterol, Hualien, Taiwan
[9] Kaohsiung Chang Gung Mem Hosp, Div Hepatogastroenterol, Kaohsiung, Taiwan
[10] Natl Taiwan Univ, Grad Inst Epidemiol, Coll Publ Hlth, Taipei 10764, Taiwan
[11] Natl Taiwan Univ, Coll Med, Hepatitis Res Ctr, Taipei 10764, Taiwan
[12] Natl Taiwan Univ Hosp, Taipei, Taiwan