Is a small-caliber or large-caliber endoscope more suitable for colonic self-expandable metallic stent placement? A randomized controlled study oleh Yosuke Minoda, Haruei Ogino, Yorinobu Sumida, Takashi Osoegawa, Soichi Itaba, Norikazu Hashimoto, Mitsuru Esaki, Yusuke Kitagawa, Kentaro Yodoe, Yoichiro Iboshi, Takahiro Matsuguchi, Mei Tadokoro, Tomohito Chaen, Hiroaki Kubo, Masaru Kubokawa, Naohiko Harada, Kenichi Nishizima, Hiroyuki Fujii, Yoshitaka Hata, Yoshimasa Tanaka, Eikichi Ihara, Yoshihiro Ogawa