title: Response.
authors.forename: Leonardo
authors.initials: L
authors.lastname: Rangel-Castilla
authors.forename: Robert F
authors.initials: RF
authors.lastname: Spetzler
mesh_terms: D002548:Cerebral Revascularization / Q000379:methods*; D005260:Female; D006801:Humans; D008297:Male; D014711:Vertebral Artery / Q000601:surgery*; D014715:Vertebrobasilar Insufficiency / Q000601:surgery*