IbuprofenAspirinCold TemperatureAnti-Inflammatory Agents, Non-SteroidalCommon ColdCyclooxygenase InhibitorsAnalgesics, Non-NarcoticPlatelet Aggregation InhibitorsAcetaminophenNaproxenThromboxane B2DiclofenacSalicylatesAntipyreticsCyclooxygenase 2 InhibitorsTiclopidineCold ClimateDouble-Blind MethodPlatelet AggregationDuctus Arteriosus, PatentIndomethacinDrug Therapy, CombinationCold IschemiaProstaglandin-Endoperoxide SynthasesCyclooxygenase 1Sodium SalicylateThromboxanesKetoprofenTherapeutic EquivalencyPlatelet Function TestsDose-Response Relationship, DrugBlood Platelets