[1] Osaka Univ, Dept Gastroenterol & Hepatol, Grad Sch Med, Suita, Osaka, Japan
[2] Hyogo Med Univ, Dept Gastroenterol, Nishinomiya, Japan
[3] Natl Hosp Org Osaka Natl Hosp, Dept Gastroenterol, Osaka, Japan
[4] Osaka Rosai Hosp, Dept Gastroenterol & Hepatol, Sakai, Japan
[5] Toyonaka City Hosp, Dept Gastroenterol, Toyonaka, Japan
[6] Japan Community Healthcare Org Osaka Hosp, Dept Gastroenterol, Osaka, Japan
[7] Itami City Hosp, Dept Gastroenterol & Hepatol, Itami, Japan
[8] Ikeda Municipal Hosp, Dept Gastroenterol, Ikeda, Osaka, Japan
[9] Suita Municipal Hosp, Dept Gastroenterol & Hepatol, Suita, Japan
[10] Keio Univ, Div Integrat Clin Pharmacol Fac Pharm, Tokyo, Japan
[11] Osaka Police Hosp, Dept Internal Med, Osaka, Japan