Receptors, ThrombopoietinMyeloproliferative DisordersLeukemiaPolycythemia VeraJanus Kinase 2Leukemia, Myeloid, AcutePrimary MyelofibrosisThrombocythemia, EssentialThrombocytosisLeukemia, Myelogenous, Chronic, BCR-ABL PositiveLeukemia, Lymphocytic, Chronic, B-CellLeukemia, ExperimentalLeukemia, LymphoidMyelodysplastic-Myeloproliferative DiseasesLeukemia, Myelomonocytic, JuvenileLeukemia, Myelomonocytic, ChronicLeukemia, Myeloid, Chronic, Atypical, BCR-ABL NegativeSplenomegalyLeukemia Virus, MurineBone MarrowFusion Proteins, bcr-abl