[1] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol & Hepatol, Okayama 7008530, Japan
[2] Okayama Univ Hosp, Dept Endoscopy, Okayama, Japan
[3] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Pathol, Okayama 7008530, Japan
[4] Tsuyama Chuo Hosp, Dept Internal Med, Okayama, Japan
[5] Kagawa Prefectural Cent Hosp, Dept Gastroenterol, Takamatsu, Kagawa, Japan
[6] Hiroshima City Hosp, Dept Internal Med, Hiroshima, Japan
[7] Japanese Red Cross Okayama Hosp, Dept Hepatol, Okayama, Japan
[8] Iwakuni Clin Ctr, Dept Gastroenterol, Iwakuni, Japan
[9] Okayama Saiseikai Gen Hosp, Dept Internal Med, Okayama, Japan
[10] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Med, Okayama 7008530, Japan