all leukemia prognosischildhood leukemia prognosischronic leukemia prognosismyeloid leukemia prognosisleukemia prognosis in adultschronic lymphocytic leukemia prognosiscll leukemia prognosisacute lymphocytic leukemia prognosisacute lymphoblastic leukemia prognosisaml leukemia prognosisacute promyelocytic leukemia prognosisacute myelogenous leukemia prognosis