Angiographically Defined Collateral Circulation and Risk of Stroke in Patients with Severe Carotid Artery Stenosis
Stroke 31:128-132, Henderson,R.D.,et al, 2000
The Value of Cerebral Angiography in Predicting Cerebral Ischemia During Carotid Endarterectomy
AJR 159:1057-1061, Schwartz,R.D., 1992