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Burden of ERCP;
Preferences for treatment of common bile duct stones

The aim of this study is: 1) to determine the burden of ERCP in patients undergoing ERCP (descriptive study) and 2) to determine patients preferences for treatment strategy of CBDS (Discrete Choice Experiments).

The use of covered expandable stents with a proximal lasso to resolve benign post-surgical biliary strictures

To investigate feasibility, safety, and effectiveness of covered expandable stents with a proximal lasso to resolve benign post-surgical strictures.