1 Department of Surgery, Coloproctology Center Takano Hospital, 3-2-55 Oe, Chuo-ku, Kumamoto, 862-0971, Japan. [email protected].
2 Department of Surgery, Coloproctology Center Takano Hospital, 3-2-55 Oe, Chuo-ku, Kumamoto, 862-0971, Japan.
3 Department of Medical Information Sciences and Administration Planning, Kumamoto University Hospital, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan.
4 The Japanese Society for Cancer of the Colon and Rectum, 2 Sanbancho, Chiyoda-ku, Tokyo, 102-0075, Japan.