[1] Okayama Univ, Grad Sch Med Dent & Pharmaceut Sci, Dept Gastroenterol & Hepatol, Okayama, Japan
[2] Okayama Saiseikai Gen Hosp, Dept Med, Okayama, Japan
[3] Toranomon Gen Hosp, Ctr Liver Dis, Kanagawa, Japan
[4] Chiba Univ, Grad Sch Med, Dept Med & Clin Oncol, Chiba, Japan
[5] Osaka Univ, Grad Sch Med, Dept Gastroenterol & Hepatol, Osaka, Japan
[6] Iwate Med Univ, Dept Internal Med 1, Iwate, Japan
[7] Kyoto Prefectural Univ Med, Grad Sch Med Sci, Kyoto, Japan
[8] Kurume Univ, Sch Med, Dept Gastroenterol, Fukuoka, Japan
[9] Kagoshima Univ, Kagoshima 890, Japan
[10] Tokyo Med & Dent Univ, Grad Sch Allied Hlth Sci, Dept Analyt Hlth Sci, Tokyo, Japan
[11] Shinshu Univ, Sch Med, Div Gastroenterol & Hepatol, Dept Internal Med, Matsumoto, Nagano 390, Japan
[12] Kurume Univ, Int Inst Liver Res, Kurume, Fukuoka 830, Japan
[13] Univ Tokyo, Fac Med, Dept Gastroenterol, Tokyo, Japan