Endoscopic submucosal dissection of a laterally spreading tumor totally invading a deep sigmoidal diverticulum using an adaptive traction strategy - Grimaldi, Jean; Napoléon, Bertrand; Masgnaux, Louis-Jean; Leblanc, Sarah; Rivory, Jérôme; Lépilliez, Vincent; Pioche, Mathieu (Endoscopy, 2023)