ErythropoietinErythropoiesisReceptors, ErythropoietinErythroid Precursor CellsErythroblastsAnemiaPolycythemiaErythroid CellsHematocritHemoglobinsPhenylhydrazinesErythrocyte CountReticulocyte CountRecombinant ProteinsHematopoiesis, ExtramedullaryIronErythrocytesGATA1 Transcription FactorColony-Forming Units AssayHematinicsbeta-ThalassemiaHematopoietic Stem CellsReticulocytesBone MarrowLeukemia, Erythroblastic, AcuteIron IsotopesHepcidinsReceptors, TransferrinAnemia, HemolyticGlobinsHematopoiesisBone Marrow CellsPolycythemia VeraCell DifferentiationYolk SacJanus Kinase 2BloodlettingReticulocytosisAnemia, HypochromicIron RadioisotopesPhlebotomyStem Cell FactorCells, CulturedFetal HemoglobinErythroid-Specific DNA-Binding FactorsSpleenFerritinsSTAT5 Transcription FactorAnemia, NeonatalAnoxiaInterleukin-3beta-GlobinsKidney Failure, ChronicBlood TransfusionAnemia, MacrocyticAnemia, Iron-DeficiencyRenal DialysisErythrocyte AgingDoping in SportsGlycophorinErythrocyte IndicesFriend murine leukemia virusGATA2 Transcription FactorGene Expression RegulationMice, Inbred C57BLSignal TransductionAntimicrobial Cationic PeptidesLiverTransferrinMegakaryocytesRNA, MessengerInjections, SubcutaneousHypoxia-Inducible Factor 1alpha-GlobinsAnemia, Diamond-BlackfanHypoxia-Inducible Factor 1, alpha SubunitErythrocyte VolumeCell DivisionHematopoietic Cell Growth FactorsCell LineSpleen Focus-Forming VirusesAnemia, RefractoryRed-Cell Aplasia, PureErythrocyte TransfusionMilk ProteinsAntigens, CD34Blood Cell CountAnemia, Dyserythropoietic, CongenitalBasic Helix-Loop-Helix Transcription FactorsFetusHemoglobin EMice, TransgenicMice, KnockoutHypoxia-Inducible Factor-Proline DioxygenasesK562 CellsProto-Oncogene ProteinsDNA-Binding ProteinsTime FactorsTranscription FactorsMolecular Sequence Data