acute vs chronic lymphocytic leukemiaacute versus chronic leukemiaacute vs chronic myeloid leukemiaacute vs chronic leukemia chartacute vs chronic leukaemiaacute leukemia treatment optionsacute lymphocyctic leukemiaacute myelogenous leukemiaacute myeloblastic leukemiaacute leukemia diagnosisacute leukemia prognosisacute leukemia in the elderly