[1] Natl Hosp Org, Nagasaki Med Ctr, Clin Res Ctr, Nagasaki, Japan
[2] Teikyo Univ, Sch Med, Dept Med, Tokyo, Japan
[3] Kagoshima Univ, Grad Sch Med & Dent Sci, Intractable Hepatobiliary Dis Study Grp, Kagoshima 890, Japan
[4] Kagoshima City Hosp, Intractable Hepatobiliary Dis Study Grp, Kagoshima, Japan
[5] Int Univ Hlth & Welf, Fukuoka Sanno Hosp, Working Grp, Fukuoka 8140001, Japan
[6] Natl Hosp Org, Nagasaki Med Ctr, Clin Res Ctr, Working Grp, Nagasaki, Japan
[7] Tokyo Womens Med Univ, Inst Gastroenterol, Dept Surg, Tokyo, Japan
[8] Kansai Med Univ, Dept Internal Med 3, Moriguchi, Osaka, Japan
[9] Kyushu Univ, Dept Surg & Sci, Fukuoka 812, Japan
[10] Kanazawa Univ, Grad Sch Med, Dept Human Pathol, Kanazawa, Ishikawa 9201192, Japan
[11] Natl Hosp Org, Kyushu Med Ctr, Dept Gastroenterol, Sendai, Miyagi, Japan
[12] Jikei Univ, Grad Sch Med, Dept Gastroenterol, Tokyo, Japan
[13] Nagasaki Univ, Grad Sch Biomed Sci, Dept Hepatol, Nagasaki, Japan
[14] Kyushu Univ, Grad Sch Med Sci, Fukuoka 812, Japan
[15] Fukuoka Univ, Fac Med, Dept Gastroenterol & Med, Fukuoka, Japan
[16] Japan Council Qual Hlth Care, Tokyo, Japan
[17] Kanazawa Univ, Grad Sch Med, Dept Human Pathol, PBC Subcomm, Kanazawa, Ishikawa 9201192, Japan
[18] Yamagata Univ, Fac Med, Dept Gastroenterol, Yamagata 990, Japan