Hypereosinophilic SyndromemRNA Cleavage and Polyadenylation FactorsReceptor, Platelet-Derived Growth Factor alphaLeukemia, Eosinophilic, AcuteBenzamidesOncogene Proteins, FusionPiperazinesPyrimidinesChronic DiseaseEosinophilsLeukemiaLeukemia, Myeloid, AcuteLeukemia, Lymphocytic, Chronic, B-CellLeukemia, LymphoidLeukemia, ExperimentalLeukemia, Myelogenous, Chronic, BCR-ABL Positive