title: In answer to the question: "As compared to what?" A progress report on the EC/IC bypass study.
mesh_terms: D002536:Cerebral Arteries / Q000601:surgery*; D002548:Cerebral Revascularization; D002561:Cerebrovascular Disorders / Q000517:prevention & control*; D002986:Clinical Trials as Topic; D006801:Humans; D008722:Methods