Cerebral Angiography Practices at US Teaching Hospitals
Stroke 28:1895-1897, Chaturvedi,S.,et al, 1997
Prospective Eval of Extracranial Carotid Stenosis:MR Angiography Compared with Conventional Angiography
AJR 163:1205-1212, 12131994., DeMarco,J.K.,et al, 1994