chronic lymphocetic leukemiatypes of chronic leukemiachronic lymphocytic leukemiamyelocytic leukemiachronic myeloid leukemia treatmentstreating chronic leukemiachronic myelogenous leukemia prognosischronic myelomonocytic leukemiachronic myelogenous leukemiachronic lymphocytic leukemia diagnosischronic lymphoblastic leukemiachronic lymphocytic leukemia prognosis