4. Prior radiotherapy, chemotherapy or biologic therapies are allowed. Previous line(s) of systemic chemotherapy should have been completed at least 2 weeks prior to starting protocol treatment. Concurrent hydroxyurea administration will be allowed to control WBC count, platelet count, or symptoms and will be discontinued 24 hours prior to the first APLIDIN® dose. For patients with CML in blast crisis, Gleevec® or other BCR-ABL Tyrosine Kinase Inhibitors must be stopped at least 7 days prior to the first APLIDIN® dose. t.