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Continue to ChatCholangioscopic Laser Lithotripsy for Complete Encrustation of the Extra-hepatic Biliary Tree By 15-year Retained Biliary Stent https://www.sages.org/meetings/annual-meeting/abstracts-archive/cholangioscopic-laser-lithotripsy-for-complete-encrustation-of-the-extra-hepatic-biliary-tree-by-15-year-retained-biliary-stent/