[1] Kinki Univ, Sch Med, Dept Gastroenterol & Hepatol, Osaka 5898511, Japan
[2] Kanazawa Univ, Grad Sch Med Sci, Dept Radiol, Kanazawa, Ishikawa, Japan
[3] Musashino Red Cross Hosp, Dept Gastroenterol & Hepatol, Tokyo, Japan
[4] Hyogo Coll Med, Dept Internal Med, Div Hepatobiliary & Pancreat Dis, Nishinomiya, Hyogo, Japan
[5] Shinshu Univ, Sch Med, Dept Radiol, Nagano, Japan
[6] Ikeda Municipal Hosp, Dept Gastroenterol, Osaka, Japan
[7] Natl Canc Ctr, Dept Hepatobiliary & Pancreat Oncol, Tokyo, Japan
[8] Fukuiken Saiseikai Hosp, Dept Diagnost Radiol, Fukui, Japan
[9] Ehime Prefectural Cent Hosp, Dept Gastroenterol, Matsuyama, Ehime, Japan
[10] Natl Canc Ctr Hosp East, Dept Hepatobiliary & Pancreat Oncol, Chiba, Japan
[11] Chiba Univ, Grad Sch Med, Dept Gastroenterol & Nephrol, Chiba, Japan
[12] Kanazawa Univ Hosp, Dept Gastroenterol, Kanazawa, Ishikawa, Japan
[13] Kanazawa Univ Hosp, Dept Radiol, Kanazawa, Ishikawa, Japan
[14] Mie Univ, Sch Med, Dept Intervent Radiol, Tsu, Mie, Japan