[1] Osaka Univ, Grad Sch Med, Dept Gastroenterol & Hepatol, Suita, Osaka, Japan
[2] Osaka Med Ctr Canc & Cardiovasc Dis, Osaka, Japan
[3] Osaka Police Hosp, Osaka, Japan
[4] Higashiosaka City Gen Hosp, Higashiosaka, Osaka, Japan
[5] Osaka Natl Hosp, Natl Hosp Org, Osaka, Japan
[6] Kansai Rousai Hosp, Amagasaki, Hyogo, Japan
[7] Natl Hosp Org, Osaka Minami Med Ctr, Kawachi Nagano, Japan
[8] Osaka Rousai Hosp, Sakai, Osaka, Japan
[9] Ikeda City Hosp, Ikeda, Osaka, Japan
[10] Kinki Cent Hosp, Itami, Hyogo, Japan
[11] Sumitomo Hosp, Osaka, Japan