Ticlopidine Aspirin Stroke Study Group - Hass, WK; Easton, JD; Adams, HP, Jr.; Pryse-Phillips, W; Molony, BA; Anderson, S; Kamm, B A (N Engl J Med, 1989)
randomized trial comparing ticlopidine hydro-chloride with aspirin for the prevention of stroke in high-risk patients