Cost-Effectiveness of Screening for Asymptomatic Carotid Atherosclerotic Disease
Stroke 27:1944-1950, Derdeyn,C.P.&Powers,W.J., 1996
Cerebrovas Dis in Sympt & Asympt Pts with Sickle Cell:Screening with Duplex Transcr Doppler US-Correl with MRI & MR
Radiology 189:457-466, Siebert,J.J.,et al, 1993
When and How to Study the Carotid Arteries
Ann Int Med 15:805-818, 835-8371988., Feussner,J.R.&Matchar,D.B., 1988