Diagnostic Yield Of Probe-Based Confocal Laser Endomicroscopy (PCLE) In Biliary Stricture Of Undefined Origin - Rizzi, F; Bruno, M; Sacco, M; Rizza, S; Gesualdo, M; Cravero, F; Fimiano, F; Castellano, F; Mauriello, A; De Angelis, CG (Endoscopy, 2021)