Underwater Endoscopic Mucosal Resection May Only Be Superior to Conventional Endoscopic Mucosal Resection for the Treatment of Colorectal Polyps 4 CM or Larger: 886. (October 2019) - Douglas, Scott R.; Stratton, Leland; Buerlein, Ross C.; Patrie, James; Shami, Vanessa M.; Sauer, Bryan; Yoshida, Cynthia; Copland, Andrew; Scheiman, James; Uppal, Dushant; Strand, Daniel; Wang, Andrew Y.