chronic monocytic leukemiaacute monocytic leukemia treatmentchronic myeloid monocytic leukemiaacute myeloid monocytic leukemiaacute monocytic leukemia prognosismonocytic leukaemiamonoblastic leukemia symptomspromonocytic leukemiaacute monocytic leukemia survival ratemonocytic differentiationacute monocytic leukaemiamonocytic aml