Platelet AdhesivenessBlood PlateletsPlatelet AggregationBlood Coagulation TestsBlood Cell CountAdenine NucleotidesFibrinolysisFibrinogenAdhesivenessPlatelet CountCell AdhesionPlatelet Membrane GlycoproteinsPlatelet Factor 4Platelet TransfusionPlatelet Activating FactorPlatelet Function TestsPlatelet Glycoprotein GPIIb-IIIa ComplexCell AggregationPlatelet Glycoprotein GPIb-IX ComplexThrombinAdenosine DiphosphateP-SelectinCalciumCells, CulturedAntigens, Human PlateletEndothelium, VascularNeutrophilsThrombocytopeniaCell Adhesion MoleculesHistamine ReleaseCollagenMegakaryocytesTime FactorsLeukocytesBleeding TimeBlood CoagulationRabbitsKineticsvon Willebrand FactorSerotoninMicroscopy, Electron, ScanningThrombosisIntercellular Adhesion Molecule-1Platelet Membrane Glycoprotein IIbThromboxane A2Cell LineBacterial AdhesionVascular Cell Adhesion Molecule-1Platelet Factor 3Signal TransductionIntegrinsDose-Response Relationship, DrugAspirinCell Movement