Park SW, Lee KJ, Chung MJ, Jo JH, et al. Covered versus uncovered double bare self-expandable metal stent for palliation
of unresectable extrahepatic malignant biliary obstruction: A randomized
controlled multicenter trial. Gastrointest Endosc 2022 Sep 6. pii: S0016-5107(22)01950.
PMID: 36084714