Acute MRI in speech or motor TIA reveals ongoing ischemia and active disease in a high proportion of patients - Krol, A; Coutts, S; Simon, J; Sohn, C; Anderson-Armitage, L; Frayne, R; Sevick, R; Eliasziw, M; Buchan, A; Demchuk, A; Grp, V (2004)