AnalgesicsAspirinPlatelet Aggregation InhibitorsAnti-Inflammatory Agents, Non-SteroidalTiclopidineThromboxane B2Cyclooxygenase InhibitorsDrug Therapy, CombinationPlatelet AggregationSalicylatesTreatment OutcomeDouble-Blind MethodDose-Response Relationship, DrugPlatelet Function TestsBlood PlateletsSodium SalicylateTime FactorsFibrinolytic AgentsHemorrhageDrug-Related Side Effects and Adverse ReactionsTablets, Enteric-CoatedDrug Administration ScheduleProspective StudiesAnticoagulantsCyclooxygenase 1Asthma, Aspirin-Induced