When to use chemotherapy for chronic hematopoietic neoplasms.
D002908:Chronic Disease; D006801:Humans; D007938:Leukemia / Q000150:complications; D007945:Leukemia, Lymphoid / Q000188:drug therapy*; D007951:Leukemia, Myeloid / Q000188:drug therapy*; D009196:Myeloproliferative Disorders; D011087:Polycythemia Vera / Q000150:complications / Q000188:drug therapy*; D055728:Primary Myelofibrosis / Q000188:drug therapy