OC.08.8 ENDOSCOPIC PAPILLARY LARGE BALLOON DILATION FOR LARGE STONES EXTRACTION IN PATIENTS WITH PERI-AMPULLARY DIVERTICULA. (24th February 2016) - Zulli, C.; Gargiulo, L.; Labianca, O.; Quagliariello, G.; Riccio, G.; Tammaro, S.; Maurano, A.