Clinical effectiveness of the pocket-creation method for colorectal endoscopic submucosal dissection oleh Akira Kanamori, Masakazu Nakano, Masayuki Kondo, Takanao Tanaka, Keiichiro Abe, Tsunehiro Suzuki, Hitoshi Kino, Yoshihito Kaneko, Chieko Tsuchida, Kouhei Tsuchida, Naoto Yoshitake, Keiichi Tominaga, Yasuo Imai, Hideyuki Hiraishi