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Comparison of Uncovered and Covered Biliary SEMS for the Salvage of Obstructed SEMS: A Multicenter Retrospective Propensity Score–Weighted Study

BACKGROUND AND AIMS: Recurrent biliary obstruction (RBO) is common after uncovered self-expandable metal stent (UCSEMS) placement in unresectable distal malignant biliary obstruction. We compared stent patency, clinical outcomes, and RBO patterns between fully covered (FCSEMSs) a...