MegakaryocytesThrombopoiesisMegakaryocyte Progenitor CellsThrombopoietinPloidiesBlood PlateletsPlatelet Factor 4Platelet Membrane Glycoprotein IIbPlatelet Membrane GlycoproteinsBone Marrow Cellsbeta-ThromboglobulinPlatelet Glycoprotein GPIIb-IIIa ComplexBone MarrowHematopoietic Stem CellsAntigens, CD34Cell DifferentiationCells, CulturedCell SeparationFluorescent Antibody TechniqueFlow CytometryMicroscopy, ElectronThrombocytopeniaReceptors, ThrombopoietinRNA, MessengerRecombinant ProteinsThrombocytosisPlatelet CountHematopoiesisNF-E2 Transcription Factor, p45 SubunitNF-E2 Transcription FactorGATA1 Transcription FactorPolyploidyErythroid-Specific DNA-Binding FactorsLeukemia, Megakaryoblastic, AcuteCytoplasmic GranulesThrombocythemia, EssentialBlood Platelet DisordersPrimary Myelofibrosis