Successful closure of a refractory rectal anastomotic fistula using endoscopic submucosal dissection combined with an over-the-scope clip - Barsic, Neven; Rivory, Jérôme; Monneuse, Olivier; Saurin, Jean-Christophe; Ponchon, Thierry; Pioche, Mathieu (Endoscopy, 2018)