[1] Kurume Univ, Sch Med, Div Gastroenterol, Dept Med, 67 Asahi Machi, Kurume, Fukuoka 8300011, Japan
[2] Kurume Univ, Liver Canc Div, Res Ctr Innovat Canc Therapy, Kurume, Fukuoka 8300011, Japan
[3] Showa Univ, Sch Med, Div Gastroenterol & Hepatol, Dept Med,Shinagawa Ku, Tokyo 1428666, Japan
[4] Natl Ctr Global Hlth & Med, Dept Gastroenterol, Shinjuku Ku, Tokyo 1628655, Japan
[5] Gifu Univ, Sch Med, Dept Gastroenterol, Gifu 5011194, Japan
[6] Tottori Univ, Dept Internal Med 2, Fac Med, Yonago, Tottori 6838504, Japan
[7] Natl Hosp Org, Clin Res Ctr, Nagasaki Med Ctr, Omura, Nagasaki 8568562, Japan
[8] NTT West Kyushu Hosp, Dept Gastroenterol & Hepatol, Chuo Ku, Kumamoto 8628655, Japan