[1] Osaka Univ, Dept Gastroenterol & Hepatol, Grad Sch Med, 2-2 Yamadaoka, Suita, Osaka 5650871, Japan
[2] Osaka Police Hosp, Dept Gastroenterol & Hepatol, Osaka, Japan
[3] Kansai Rosai Hosp, Dept Gastroenterol & Hepatol, Amagasaki, Hyogo, Japan
[4] Yao Municipal Hosp, Dept Gastroenterol & Hepatol, Yao, Osaka, Japan
[5] Minoh City Hosp, Dept Gastroenterol & Hepatol, Osaka, Japan
[6] Osaka Rosai Hosp, Dept Gastroenterol & Hepatol, Sakai, Osaka, Japan
[7] Toyonaka City Hosp, Dept Gastroenterol & Hepatol, Toyonaka, Osaka, Japan
[8] Hyogo Prefectural Nishinomiya Hosp, Dept Gastroenterol & Hepatol, Nishinomiya, Hyogo, Japan
[9] Osaka Hosp, Dept Gastroenterol & Hepatol, Japan Community Healthcare Org, Osaka, Japan
[10] Osaka Gen Med Ctr, Dept Gastroenterol & Hepatol, Osaka, Japan
[11] Otemae Hosp, Dept Gastroenterol & Hepatol, Osaka, Japan