within 3 weeks of the event , 505 patients with cerebral infarction , minor or major stroke , were randomly assigned to treatment with acetylsalicylic acid ( asa ) 1.5 g/day or placebo in a double-blind clinical trial with a follow-up of 2 years in all patients .
C0007785
cerebral infarction
C0004057
acetylsalicylic acid