1) Department of Surgery, Ohta Nishinouchi Hospital, Koriyama, Japan
2) Department of Hepatobiliary and Pancreatic Surgery, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan

Shotaro Gan¹⁾²⁾, Yasuhito Iwao¹⁾²⁾, Kota Sato¹⁾, Norimichi Chiyonobu¹⁾, Yoshihiro Sakai¹⁾, Yuya Maruyama¹⁾, Momoko Sugimoto¹⁾, Satoshi Fukai¹⁾, Shigeru Akashige¹⁾, Hisahito Endo¹⁾, Taisuke Ito¹⁾, Mutsuo Yamada¹⁾, Yoshimasa Ishii¹⁾, Shigeru Yamazaki¹⁾