P.18.7 ENDOSCOPIC PAPILLARY LARGE BALLOON DILATION FOR THE REMOVAL OF LARGE STONES IN ELDERLY PATIENTS (80 YEARS OLD OR OVER). (24th February 2016) - Zulli, C.; Gargiulo, L.; Napoli, G.; Labianca, O.; Riccio, G.; Tammaro, S.; Maurano, A.