title: Indications for bilateral bypass operations.
mesh_terms: D001157:Arterial Occlusive Diseases / Q000601:surgery; D001161:Arteriosclerosis / Q000601:surgery; D002340:Carotid Artery Diseases / Q000601:surgery; D002548:Cerebral Revascularization; D006801:Humans; D008297:Male; D008875:Middle Aged; D012164:Retinal Diseases / Q000601:surgery