Pisello, Franco Permanent stenting in "unextractable" common bile duct stones in high risk patients. A prospective randomized study comparing two different stents. [electronic resource] - Langenbeck's archives of surgery Nov 2008 - 857-63 p. digital Publication Type: Comparative Study; Journal Article; Randomized Controlled Trial ISSN: 1435-2451 Standard No.: 10.1007/s00423-008-0388-1 doi Subjects--Topical Terms: AgedAged, 80 and overCause of DeathCholangiopancreatography, Endoscopic RetrogradeCholestasis, Extrahepatic--diagnosisCoated Materials, BiocompatibleComorbidityEquipment DesignEquipment FailureFemaleFollow-Up StudiesGallstones--diagnosisHumansIsocyanatesLiver Function TestsMalePalliative CarePolyethylenePolyurethanesPostoperative Complications--mortalityPovidone--analogs & derivativesRisk FactorsSphincterotomy, EndoscopicStents