MP44-18 PROLONGED ENDOUROLOGICAL TRAINING IS THE KEY TO IMPROVE SURGICAL OUTCOMES OF STONE PATIENTS TREATED WITH FLEXIBLE URETEROSCOPY. (May 2022) - Villa, Luca; Dioni, Pietro; Fantin, Margherita; de Angelis, Mario; Corsini, Christian; Traxer, Olivier; Briganti, Alberto; Montorsi, Francesco; Ventimiglia, Eugenio; Salonia, Andrea