[1] Kyoto Prefectural Univ Med, Dept Gastroenterol & Hepatol, Kyoto, Japan
[2] Hokkaido Univ Hosp, Div Endoscopy, Sapporo, Hokkaido, Japan
[3] Tokyo Med & Dent Univ, Dept Gastrointestinal Surg, Tokyo, Japan
[4] Tokushima Univ, Grad Sch Biomed Sci, Dept Gastroenterol & Oncol, Tokushima, Japan
[5] Tohoku Univ, Grad Sch Med, Div Gastroenterol, Sendai, Miyagi, Japan
[6] Natl Hosp Org Shikoku Canc Ctr, Dept Gastroenterol, Matsuyama, Ehime, Japan
[7] Okayama Univ, Grad Sch Med, Dept Gastroenterol & Hepatol, Okayama, Japan
[8] Kawasaki Med Sch, Dept Internal Med, Div Gastroenterol, Kurashiki, Okayama, Japan
[9] Asahi Univ Hosp, Dept Gastroenterol, Gifu, Japan
[10] Kagoshima Univ, Grad Sch Med & Dent Sci, Digest & Lifestyle Dis, Kagoshima, Japan
[11] Nagasaki Univ, Grad Sch Biomed Sci, Nagasaki Univ Hosp, Dept Gastroenterol & Hepatol, Nagasaki, Japan
[12] Hiroshima Univ Hosp, Dept Endoscopy, Hiroshima, Japan
[13] Kyoto Prefecural Univ Med, Dept Gastroenterol & Hepatol, North Med Ctr, Yosano, Japan
[14] Saga Med Sch, Dept Internal Med & Gastrointestinal Endoscopy, Saga, Japan
[15] Oita Univ Hosp, Dept Gastroenterol, Oita, Japan
[16] Osaka Med Coll, Dept Internal Med 2, Osaka, Japan
[17] Kawasaki Med Sch, Gen Med Ctr, Gen Internal Med 2, Okayama, Japan
[18] Otaru Ekiseikai Gen Hosp, Dept Gastroenterol, Otaru, Hokkaido, Japan
[19] Kyoto Prefectural Univ Med, Dept Mol Targeting Canc Prevent, Osaka, Japan
[20] Hakodate Hosp, Natl Hosp Org, Hakodate, Hokkaido, Japan