title: Failed grafts and level of amputation.
mesh_terms: D000671:Amputation, Surgical / Q000379:methods*; D001158:Arteries / Q000601:surgery; D006083:Graft Occlusion, Vascular / Q000209:etiology* / Q000601:surgery; D006801:Humans; D007511:Ischemia / Q000601:surgery; D007717:Knee; D007866:Leg / Q000098:blood supply / Q000601:surgery; D012086:Reoperation; D012306:Risk