HematocritHemodilutionBlood ViscosityErythrocyte CountPlasma VolumeHemoglobinsErythropoietinAnemiaPolycythemiaErythrocyte VolumeBlood VolumeExchange Transfusion, Whole BloodErythrocyte IndicesBloodlettingErythrocytesHematologic TestsHemoglobinometryErythrocyte AggregationBlood Cell CountPlasma SubstitutesIronErythrocyte TransfusionBlood Chemical AnalysisReticulocyte CountErythropoiesisBlood PressureOxygenBlood Volume DeterminationHemorheologyBlood TransfusionPhlebotomyBlood ProteinsRenal DialysisKidney Failure, ChronicAnemia, NeonatalErythrocyte DeformabilityIsotonic SolutionsAltitudeDehydrationSerum AlbuminPlatelet CountAnemia, HypochromicHydroxyethyl Starch DerivativesTime FactorsBlood SubstitutesCapillariesHemodynamicsBody WeightBlood Transfusion, AutologousPolycythemia VeraFerritinsBlood Flow VelocityBlood Loss, SurgicalMicrocirculationEaglesRheologyCerebrovascular CirculationReference ValuesBlood Specimen Collection