Lymphocyte TransfusionLymphocytesLeukocyte CountLymphocyte CountBlood TransfusionLymphocyte ActivationCD4 Lymphocyte CountErythrocyte TransfusionLymphocyte SubsetsT-LymphocytesPlatelet TransfusionExchange Transfusion, Whole BloodB-LymphocytesBlood Transfusion, AutologousBlood Component TransfusionPhytohemagglutininsCD4-Positive T-LymphocytesLymphopeniaBlood Transfusion, IntrauterineFlow CytometryHIV InfectionsCells, CulturedLymphocyte Culture Test, MixedSpleenFetofetal TransfusionConcanavalin ATime Factors