Surgical Procedures for Early Colorectal Cancer - Takeshita, Emiko; Tagaya, Nobumi; Yoshiba, Hidemaro; Sameshima, Shinichi; Okuyama, Takashi; Oya, Masatoshi; Sugamata, Yoshitake; Koketsu, Shinichiro (Nippon Daicho Komonbyo Gakkai Zasshi, 2012)