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Proposed diagnostic and treatment algorithm for biliary strictures. MR: Magnetic resonance; BE: Bilioenteric; PBI: Percutaneous biliary interventions; PTC: Percutaneous transhepatic cholangiography; DD: Duct-to-duct; US: Ultrasonography; GGT: Gamma-glutamyl transferase; ERCP: Endoscopic retrograde cholangio pancreatography.
