1) Dept. of Surgery, Okayama Saiseikai General Hospital, Okayama, Japan
2) Watanabe Hospital, niimi, Japan
3) Okayama University Cardiovascular Surgery, Okayama, Japan
4) Dept. of General Thoracic Surgery and Breast and Endocrinological Surgery, Okayama University, Okayama, Japan
5) Dept. of Gastroenterological Surgery, Okayama University, Okayama, Japan

Yuko Takehara¹⁾, Taeko Mizo²⁾, Junko Kobayashi³⁾, Misaki Sakamoto¹⁾, Kaori Nitta¹⁾, Yurie Kudo¹⁾, Kazuya Yasui⁵⁾, Satoru Kikuchi⁵⁾, Shinji Kuroda⁵⁾, Ryuichi Yoshida⁵⁾, Mikio Okazaki⁴⁾, Tadahiko Shien⁴⁾, Masaomi Yamane⁴⁾, Yasuhiro Kodani³⁾, Shinichi Toyooka⁴⁾, Shingo Kasahara³⁾, Hiroyoshi Doihara⁴⁾, Toshiyoshi Fujiwara⁵⁾