P.06.21: Utility of Spyglass® Single-Operator Peroral Cholangioscopy for Diagnosis and Therapy of Intra-Ductal Biliary Diseases: One-Year Activity Report from two Italian ERCP High-Volume Centres. (15th March 2017) - Zulli, C.; Labianca, O.; Di Mitri, R.; Mocciaro, F.; Tammaro, S.; Napoli, M.; Pecoraro, G.M.; Maurano, A.