A new technique for endoscopic submucosal dissection for early gastric cancer using an external grasping forceps

H. Imaeda, Yasushi Iwao, Haruhiko Ogata, H. Ichikawa, M. Mori, N. Hosoe, Tatsuhiro Masaoka, M. Nakashita, Hidekazu Suzuki, Nagamu Inoue, K. Aiura, H. Nagata, K. Kumai, T. Hibi