Outcome of Stroke Patients without Angioigraphically Revealed Arterial Oclussion within Four Hours of Symptom Onset
AJNR 22:685-690, Derex, L.,et al, 2001
Stroke Magnetic Resonance Imaging Within 6 Hours After Onset of Hyperacute Cerebral Ischemia
Ann Neurol 49:460-469, Schellinger,P.D.,et al, 2001