[1] Hyogo Med Univ, Dept Internal Med, Div Gastroenterol & Hepatol, 1-1 Mukogawa Cho, Nishinomiya, Hyogo 6638501, Japan
[2] Japanese Red Cross Himeji Hosp, Dept Internal Med, Himeji, Hyogo, Japan
[3] Gifu Kyoritsu Univ, Dept Nursing, Gifu, Japan
[4] Ehime Prefectural Cent Hosp, Gastroenterol Ctr, Matsuyama, Ehime, Japan
[5] Okayama City Hosp, Dept Gastroenterol, Okayama, Japan
[6] Kagawa Univ, Dept Gastroenterol & Hepatol, Takamatsu, Kagawa, Japan
[7] Ehime Univ, Grad Sch Med, Dept Gastroenterol & Metabol, Matsuyama, Ehime, Japan
[8] Kagawa Prefectural Cent Hosp, Dept Hepatol, Takamatsu, Kagawa, Japan
[9] Nippon Med Sch, Dept Internal Med, Div Gastroenterol & Hepatol, Tokyo, Japan
[10] Osaka Med & Pharmaceut Univ, Dept Gastroenterol, Osaka, Japan
[11] Asahi Gen Hosp, Dept Gastroenterol, Chiba, Japan
[12] Teine Keijinkai Hosp, Ctr Gastroenterol, Sapporo, Hokkaido, Japan
[13] Toyama Univ Hosp, Dept Gastroenterol, Toyama, Japan
[14] Japanese Red Cross Matsuyama Hosp, Hepatobiliary Ctr, Matsuyama, Ehime, Japan
[15] Saiseikai Niigata Hosp, Dept Gastroenterol, Niigata, Japan
[16] Ogaki Municipal Hosp, Dept Gastroenterol & Hepatol, Gifu, Japan
[17] Japanese Red Cross Takamatsu Hosp, Dept Gastroenterol, Takamatsu, Kagawa, Japan
[18] Gunma Saiseikai Maebashi Hosp, Dept Gastroenterol, Gunma, Japan
[19] Natl Hosp Org Takasaki Gen Med Ctr, Dept Clin Res, Gunma, Japan
[20] Hamamatsu Univ, Sch Med, Dept Hepatol, Shizuoka, Japan
[21] Otakanomori Hosp, Div Gastroenterol & Hepatol, Chiba, Japan
[22] Kansai Med Univ, Dept Surg, Osaka, Japan
[23] Natl Hosp Org Takasaki Gen Med Ctr, Dept Gastroenterol, Gunma, Japan
[24] Himeji St Marys Hosp, Dept Internal Med, Himeji, Hyogo, Japan