[1] Gunma Univ, Grad Sch Med, Dept Hepatobiliary & Pancreat Surg, Maebashi, Gunma, Japan
[2] Kyushu Univ, Grad Sch Med Sci, Dept Surg & Sci, Fukuoka, Fukuoka, Japan
[3] Kyushu Univ, Dept Surg, Fukuoka, Fukuoka, Japan
[4] Fukuoka City Hosp, Dept Surg, Fukuoka, Fukuoka, Japan
[5] Saiseikai Fukuoka Gen Hosp, Dept Surg, Fukuoka, Fukuoka, Japan
[6] Oita Prefectural Hosp, Dept Surg, Oita, Japan
[7] Iizuka Hosp, Dept Surg, Fukuoka, Fukuoka, Japan
[8] Munakata Med Assoc Hosp, Dept Surg, Fukuoka, Fukuoka, Japan
[9] Steel Mem Yawata Hosp, Dept Surg Gastroenterol, Fukuoka, Fukuoka, Japan
[10] Natl Kyushu Canc Ctr, Dept Hepatobiliary Pancreat Surg, Fukuoka, Fukuoka, Japan
[11] Matsuyama Red Cross Hosp, Dept Surg, Matsuyama, Ehime, Japan
[12] Oita Red Cross Hosp, Dept Surg, Oita, Japan
[13] Hiroshima Red Cross Hosp, Dept Surg, Hiroshima, Japan
[14] Atom Bomb Survivors Hosp, Hiroshima, Japan