Intrabiliary resection of metastasis originating from colorectal carcinoma during direct peroral cholangioscopy: a new tool for biliary palliation - Anderloni, Andrea; Fugazza, Alessandro; Auriemma, Francesco; Maselli, Roberta; D’Amico, Ferdinando; Troncone, Edoardo; Repici, Alessandro (Endoscopy, 2018)