title: With or against the bile flow?
mesh_terms: D001661:Biliary Tract Neoplasms / Q000150:complications*; D002779:Cholestasis / Q000209:etiology / Q000628:therapy*; D004724:Endoscopy; D006801:Humans; D008670:Metals; D010166:Palliative Care; D020959:Polyethylene; D015607:Stents / Q000009:adverse effects
chemical_list: D008670:Metals; D020959:Polyethylene