Recent changes in criteria for selecting the level of amputation of the leg.
D000671:Amputation, Surgical; D006801:Humans; D007511:Ischemia / Q000601:surgery; D007717:Knee; D007866:Leg / Q000098:blood supply / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000098:blood supply; D009336:Necrosis