Risk factors of unintentional piecemeal resection in endoscopic mucosal resection for colorectal polyps ≥ 10 mm oleh Tsubasa Ishikawa, Kenichiro Okimoto, Tomoaki Matsumura, Sadahisa Ogasawara, Yoshihiro Fukuda, Yoshio Kitsukawa, Yuya Yokoyama, Kengo Kanayama, Naoki Akizue, Yotaro Iino, Yuki Ohta, Hideaki Ishigami, Takashi Taida, Shin Tsuchiya, Keiko Saito, Hidehiro Kamezaki, Akitoshi Kobayashi, Yasuharu Kikuchi, Minoru Tada, Yuki Shiko, Yoshihito Ozawa, Jun Kato, Taketo Yamaguchi, Naoya Kato