AspirinPlatelet Aggregation InhibitorsThromboxane B2Platelet AggregationTiclopidineAnti-Inflammatory Agents, Non-SteroidalMedication ErrorsMedication AdherenceBlood PlateletsDrug Therapy, CombinationDouble-Blind MethodDose-Response Relationship, DrugMedication ReconciliationMedication SystemsMedication Systems, HospitalSelf MedicationDrug PrescriptionsPatient CompliancePrescription DrugsCyclooxygenase InhibitorsPolypharmacyDrug TherapyTreatment OutcomeSalicylatesPsychotropic DrugsDrug UtilizationRisk FactorsPlatelet Function TestsNonprescription DrugsUnited StatesAntipsychotic AgentsProspective StudiesAntihypertensive AgentsDrug-Related Side Effects and Adverse ReactionsPharmacistsClinical Pharmacy Information SystemsDrug CostsFollow-Up StudiesTime FactorsRetrospective StudiesPharmaceutical PreparationsFibrinolytic AgentsSodium SalicylateAnticoagulantsMedical Order Entry SystemsAntidepressive AgentsWarfarinCohort StudiesHemorrhageDrug Therapy, Computer-AssistedDrug InteractionsTablets, Enteric-CoatedPhysician's Practice PatternsElectronic PrescribingQuestionnairesTreatment RefusalAsthma, Aspirin-InducedDrug Administration Schedule