Myeloproliferative DisordersPolycythemia VeraThrombocythemia, EssentialPrimary MyelofibrosisThrombocytosisJanus Kinase 2Leukemia, Myelogenous, Chronic, BCR-ABL PositiveReceptors, ThrombopoietinLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeFusion Proteins, bcr-ablBone MarrowChronic DiseaseBenzamidesLeukemia, Myelomonocytic, JuvenileHematopoietic Stem CellsSplenomegalyLeukemia, MyeloidLeukemia, Myelomonocytic, ChronicMegakaryocytesMutationHematopoiesis, ExtramedullaryLeukemia, Myeloid, AcuteMyelodysplastic SyndromesGenes, ablReceptor, Platelet-Derived Growth Factor betaLeukocytosisOncogene Proteins, FusionSTAT5 Transcription Factor