[1] Univ Tokyo, Grad Sch Med, Dept Gastroenterol, Tokyo, Japan
[2] Japanese Fdn Canc Res, Dept Gastroenterol, Canc Inst Hosp, Tokyo, Japan
[3] Tokyo Womens Med Univ, Inst Gastroenterol, Tokyo, Japan
[4] Japanese Red Cross Med Ctr, Dept Gastroenterol, Tokyo, Japan
[5] Showa Univ, Div Gastroenterol, Dept Med, Sch Med, Tokyo, Japan
[6] Toranomon Gen Hosp, Dept Gastroenterol, Tokyo, Japan
[7] Nihon Univ, Dept Gastroenterol & Hepatol, Itabashi Hosp, Tokyo, Japan
[8] Tokyo Med Univ, Dept Gastroenterol & Hepatol, Tokyo, Japan
[9] Tokyo Metropolitan Police Hosp, Dept Gastroenterol, Tokyo, Japan
[10] Mitsui Mem Hosp, Dept Gastroenterol, Tokyo, Japan
[11] JR Tokyo Gen Hosp, Dept Gastroenterol, Tokyo, Japan
[12] JHCO Tokyo Takanawa Hosp, Dept Gastroenterol, Tokyo, Japan
[13] Kanto Cent Hosp, Dept Gastroenterol, Tokyo, Japan
[14] St Lukes Int Hosp, Dept Gastroenterol, Tokyo, Japan
[15] Toho Univ, Div Gastroenterol & Hepatol, Dept Internal Med, Ohashi Med Ctr, Tokyo, Japan
[16] Juntendo Univ, Grad Sch Med, Dept Gastroenterol, Tokyo, Japan
[17] Saitama Med Univ, Saitama Med Ctr, Dept Gastroenterol & Hepatol, Saitama, Japan
[18] Saitama Med Univ, Int Med Ctr, Dept Gastroenterol, Saitama, Japan
[19] Ageo Cent Gen Hosp, Dept Gastroenterol, Saitama, Japan
[20] Chiba Univ, Grad Sch Med, Dept Gastroenterol & Nephrol, Chiba, Japan
[21] Kimitsu Chuo Hosp, Dept Gastroenterol, Chiba, Japan
[22] Asahi Gen Hosp, Dept Gastroenterol, Chiba, Japan
[23] Jichi Med Univ Hosp, Dept Gastroenterol, Shimotsuke, Japan
[24] Dokkyo Med Univ, Dept Gastroenterol, Mibu, Tochigi, Japan
[25] Tokai Univ, Sch Med, Dept Gastroenterol, Tokai, Ibaraki, Japan
[26] Yokohama City Univ, Med Ctr, Gastroenterol Ctr, Yokohama, Kanagawa, Japan
[27] Showa Univ, Fujigaoka Hosp, Dept Gastroenterol, Yokohama, Kanagawa, Japan
[28] Kitasato Univ Hosp, Dept Gastroenterol, Sagamihara, Kanagawa, Japan
[29] Teikyo Univ, Mizonokuchi Hosp, Dept Gastroenterol, Kawasaki, Kanagawa, Japan
[30] Gunma Univ Hosp, Dept Gastroenterol, Maebashi, Gunma, Japan