1Kase CS,Wolf PA.Chodosh EH,et al.Prevalence of silent stroke in patients presenting with initial stroke[J].The Framingham study stroke,1989,20(7):850.
2Herderschee D,Hijdra A,Algra A,et al.Silent stroke in patients with transient ischemi attack or minor ischemic stroke[J].stroke,1992,23(9):1220.