A New Tool For Bile Duct Tissue Sampling: Ex-Vivo Clinical Evaluation of Intraductal Cryobiopsy for Cholangioscopy - Wirsing, L; Linzenbold, W; Enderle, M; Stahl, P; Traenkenschuh, W; Leibold, T; Albert, J; Peveling-Oberhag, J (Endoscopy, 2021)