The facilitation of a new traction device (S-O clip) assisting endoscopic submucosal dissection for superficial colorectal neoplasms - Sakamoto, N.; Osada, T.; Shibuya, T.; Beppu, K.; Matsumoto, K.; Shimada, Y.; Konno, A.; Kurosawa, A.; Nagahara, A.; Ohkusa, T.; Ogihara, T.; Watanabe, S. (Endoscopy, 2008)