[1] Fukushima Med Univ, Dept Gastroenterol, Sch Med, 1 Hikarigaoka, Fukushima 9601295, Japan
[2] Akasaka Sanno Med Ctr, Int Univ Hlth & Welf, Tokyo, Japan
[3] Ehime Univ, Grad Sch Med, Dept Gastroenterol & Metabol, Matsuyama, Ehime, Japan
[4] Kurume Univ, Dept Med, Sch Med, Kurume, Fukuoka, Japan
[5] Shinshu Univ, Div Gastroenterol & Hepatol, Dept Med, Sch Med, Matsumoto, Nagano, Japan
[6] Okayama Univ, Dept Gastroenterol & Hepatol, Grad Sch Med Dent & Pharmaceut Sci, Okayama, Japan
[7] Keio Univ, Dept Internal Med, Sch Med, Tokyo, Japan
[8] Teine Keijinkai Hosp, Ctr Gastroenterol, Sapporo, Hokkaido, Japan
[9] Toranomon Gen Hosp, Dept Hepatol, Kawasaki, Kanagawa, Japan
[10] Saiseikai Yokohamashi Tobu Hosp, Dept Pediat Hepatol & Gastroenterol, Yokohama, Kanagawa, Japan
[11] Jikei Univ, Dept Gastroenterol & Hepatol, Hosp 3, Sch Med, Tokyo, Japan
[12] Kanazawa Univ, Dept Human Pathol, Grad Sch Med, Kanazawa, Ishikawa, Japan
[13] Univ Fukui, Dept Internal Med 2, Fac Med Sci, Fukui, Japan
[14] Sendai Kousei Hosp, Dept Hepatol, Sendai, Miyagi, Japan
[15] Juntendo Univ, Dept Gastroenterol & Hepatol, Shizuoka Hosp, Izunokuni, Japan
[16] Tokushima Univ, Inst Biomed Sci, Dept Pathol & Lab Med, Grad Sch, Tokushima, Japan
[17] Teikyo Univ, Dept Med, Sch Med, Tokyo, Japan