myelomonocytic leukemiacmml chronic myelomonocytic leukemiachronic monocytic leukemiamyelomonocytic leukaemiachronic myelogenous leukemiachronic lymphocetic leukemiachronic myeloid leukemia treatmentschronic lymphocytic leukemiachronic lymphoma leukemiachronic lymphoid leukemiachronic eosinophilic leukemiachronic myelogenous leukemia prognosis