[1] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol & Hepatol, Okayama 7008530, Japan
[2] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Mol Hepatol, Okayama 7008530, Japan
[3] Okayama Univ Hosp, Dept Endoscopy, Okayama, Japan
[4] Okayama Univ Hosp, Dept Pathol, Okayama, Japan
[5] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gen Med, Okayama 7008530, Japan
[6] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Pathol, Okayama 7008530, Japan