NCT02340728 2020-10-22Endoscopic Biliary Co-axial Stent Placement Plus/Minus Use of Radiofrequency Ablation (RFA) for Clearance of Occluded Self Expandable Metal Stents (SEMS) in Patients With Distal Biliary Obstruction From Unresectable Biliary-pancreatic MalignanciesMemorial Sloan Kettering Cancer CenterPhase 3 Completed24 enrolled 9 charts