1. Amarenco P, Duyckaerts C, Tzourio C, Henin D, Bousser M-G, Hauw J-J (1992) The prevalence of ulcerated plaques in the aortic arch in patients with stroke. N Engl J Med 326: 221–225
2. Aring C, Meritt H (1935) Differential diagnosis between cerebral hemorrhage and cerebral thrombosis. Arch Intern Med 56: 435–456
3. Barbas N, Caplan LR, Baquis GD et al. (1987) Dental chair intracerebral hemorrhage. Neurology 37: 511–512
4. Caplan LR (1991) Of birds and nests and brain emboli. Rev Neurol 147: 265–273
5. Caplan LR (1993a) Stroke: a clinical approach, 2nd edn. Butterworths, Boston