AspirinSensitivity and SpecificityPlatelet Aggregation InhibitorsMedication AdherenceAnti-Inflammatory Agents, Non-SteroidalMedication ErrorsAnti-Bacterial AgentsAntibiotic ProphylaxisTiclopidineDrug Therapy, CombinationThromboxane B2Microbial Sensitivity TestsCyclooxygenase InhibitorsDrug UtilizationPlatelet AggregationMedication ReconciliationMedication SystemsSalicylatesMedication Systems, HospitalTime FactorsTreatment OutcomeDrug PrescriptionsProspective StudiesPlatelet Function TestsDose-Response Relationship, DrugDrug Resistance, MicrobialDrug Resistance, BacterialRisk FactorsDouble-Blind MethodSelf MedicationAntibiotics, AntineoplasticBlood PlateletsStreptomycesRetrospective StudiesAminoglycosidesSodium SalicylateDrug ResistanceFibrinolytic AgentsPatient Compliance