[1] Yamaguchi Univ, Grad Sch Med, Dept Gastroenterol & Hepatol, 1-1-1 Minami Kogushi, Ube, Yamaguchi, Japan
[2] Saitama Med Univ, Dept Gastroenterol & Hepatol, Saitama, Japan
[3] Kagoshima Univ, Grad Sch Med & Dent Sci, Digest & Lifestyle Dis, Kagoshima, Japan
[4] Kagoshima City Hosp, Dept Gastroenterol & Hepatol, Kagoshima, Japan
[5] Chiba Univ, Grad Sch Med, Dept Gastroenterol, Chiba, Japan
[6] Iwate Med Univ, Dept Internal Med, Div Hepatol, Morioka, Iwate, Japan
[7] Int Univ Hlth & Welf, Dept Gastroenterol, Narita, Japan
[8] Gifu Univ, Grad Sch Med, Dept Gastroenterol & Hematol, Gifu, Japan
[9] Juntendo Univ, Shizuoka Hosp, Dept Gastroenterol & Hepatol, Izunokuni, Japan
[10] Niigata Univ, Grad Sch Med & Dent Sci, Div Gastroenterol & Hepatol, Niigata, Japan
[11] Teikyo Univ, Fac Med Technol, Tokyo, Japan