TY - JOUR AU - Lee, S H; Gromski, M A; Derevianko, A TI - Efficacy of a prototype endoscope with two deflecting working channels for endoscopic submucosal dissection: a prospective, comparative, ex vivo study JO - Gastrointest Endosc VL - 72 PY - 2010 DO - 10.1016/j.gie.2010.01.056 L3 - PubMed-ID: 20493486 SP - 155 EP - 160 N1 - et al. ER -