title: Preoperative evaluation of polytetrafluoroethylene graft occlusions. Is angiography of value?
mesh_terms: D000792:Angiography; D001807:Blood Vessel Prosthesis / Q000009:adverse effects*; D005263:Femoral Artery / Q000000981:diagnostic imaging / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011138:Polytetrafluoroethylene; D011150:Popliteal Artery / Q000000981:diagnostic imaging / Q000601:surgery*; D012189:Retrospective Studies
chemical_list: D011138:Polytetrafluoroethylene