AspirinHeart FailurePlatelet Aggregation InhibitorsAnti-Inflammatory Agents, Non-SteroidalTreatment FailureTiclopidineThromboxane B2Cyclooxygenase InhibitorsPlatelet AggregationSalicylatesPlatelet Function TestsDrug Therapy, CombinationBlood PlateletsSodium SalicylateFibrinolytic AgentsTreatment OutcomeHemorrhageAnticoagulantsAsthma, Aspirin-InducedTablets, Enteric-CoatedWarfarinTime FactorsKidney Failure, ChronicCyclooxygenase 1Risk FactorsGastrointestinal HemorrhageProspective StudiesDouble-Blind MethodDose-Response Relationship, DrugBleeding TimePlatelet ActivationProstaglandin-Endoperoxide SynthasesThromboxanesFailure to ThriveIbuprofenThrombosisMyocardial InfarctionThromboxane A2Follow-Up StudiesCyclooxygenase 2 InhibitorsAcetaminophenDipyridamoleLiver Failure, AcuteDrug ResistanceLipoxinsIndomethacinStrokeSulfinpyrazoneGastric MucosaCyclooxygenase 2Reye SyndromeStomach UlcerProstaglandinsLiver FailureNaproxenRetrospective StudiesRisk Assessment