[1] Osaka Univ, Grad Sch Med, Dept Gastroenterol & Hepatol, Suita, Osaka, Japan
[2] Osaka Univ, Grad Sch Med, Dept Mol Biochem & Clin Invest, Suita, Osaka, Japan
[3] Kochi Med Sch, Dept Gastroenterol & Hepatol, Nankoku, Kochi, Japan
[4] Hiroshima Univ, Dept Gastroenterol & Metab, Hiroshima, Japan
[5] Osaka City Juso Hosp, Dept Gastroenterol, Osaka, Japan
[6] Kyoto Prefectural Univ Med, Dept Gastroenterol & Hepatol, Kyoto, Japan
[7] Nara City Hosp, Ctr Digest & Liver Dis, Nara, Japan
[8] aMs New Otani Clin, Osaka, Japan
[9] Osaka City Univ, Grad Sch Med, Dept Hepatol, Osaka 558, Japan