AspirinPlatelet Aggregation InhibitorsAnti-Inflammatory Agents, Non-SteroidalTiclopidineThromboxane B2Cyclooxygenase InhibitorsPlatelet AggregationSalicylatesPlatelet Function TestsDrug Therapy, CombinationBlood PlateletsSodium SalicylateFibrinolytic AgentsTreatment OutcomeHemorrhageRisk FactorsAsthma, Aspirin-InducedAnticoagulantsProspective StudiesWarfarinTablets, Enteric-CoatedGastrointestinal HemorrhageTime FactorsCyclooxygenase 1Bleeding TimeProstaglandin-Endoperoxide SynthasesDose-Response Relationship, DrugPlatelet ActivationIbuprofenThromboxanesFollow-Up StudiesThromboxane A2ThrombosisSymptom AssessmentCyclooxygenase 2 InhibitorsDouble-Blind MethodDipyridamoleDepressionMyocardial InfarctionStrokeQuestionnairesAcetaminophenLipoxinsDrug ResistanceIndomethacinGastric MucosaSulfinpyrazoneSeverity of Illness IndexGastrointestinal DiseasesStomach UlcerCyclooxygenase 2Reye SyndromeNaproxenRecurrenceProstaglandinsDrug Hypersensitivity