title: Venous ulceration--a further factor.
mesh_terms: D003097:Collateral Circulation; D005260:Female; D006801:Humans; D007866:Leg / Q000098:blood supply; D008297:Male; D008875:Middle Aged; D012501:Saphenous Vein / Q000601:surgery; D014647:Varicose Ulcer / Q000601:surgery*