Antigens, Human PlateletPlatelet TransfusionBlood TransfusionBlood PlateletsPlatelet CountThrombocytopeniaPlateletpheresisErythrocyte TransfusionPlatelet AggregationBlood Component TransfusionRefractory Period, ElectrophysiologicalIsoantibodiesThrombocytopenia, Neonatal AlloimmuneBlood Transfusion, IntrauterineBlood Transfusion, AutologousHemorrhageBlood Grouping and CrossmatchingPlatelet AdhesivenessBlood PreservationExchange Transfusion, Whole BloodPlatelet Membrane GlycoproteinsBlood Component Removal