White blood cells (WBC) > x ^/L, within days prior to administration of study treatment White blood cells (WBC) > x ^/L, measured within days prior to administration of study treatment Measured within days prior to registration: white blood cells > ,/mcL More than % white blood cells in bone marrow. White blood cells (WBC) > , cells/mcL ( cells x ^/L) at screening. In subjects with WBC > , cells/mcL at screening with lymphocyte predominance, subject may be deemed eligible for the trial by the Amgen physician, after discussion with the investigator. White blood cells (WBC) >= . x ^/L White blood cells (WBC) > x ^/L Total white blood cells (WBC) < x^/L (/mm^) White blood cells (WBC) < , White blood cells (WBC) >= x ^/L, completed within days prior to the date of registration White blood cells >= ,/microliter White blood cells (WBC) >= /mm^ White blood cells (WBC) >= ,/mm^ White blood cells (WBC) > , cells/mcL at screening White blood cells (WBC) >= ,/mm^ White blood cells (WBC) >= /mm^ PART I: White blood cell (WBC) >= , cells/mm^ White blood cells (WBC) (> /mm^) White blood cells (WBC) >= . White blood cells (WBC) > ,/mcL Normal white blood cells (WBC) (> /mm^) White blood cells (WBC) >= /mm^ Within days prior to administration of study treatment: White blood cells (WBC) > x ^/L. White blood cell (WBC) >= x ^ cells/mL White blood cells (WBC) >= /mm^ White blood cells (WBC) > x ^/L White blood cells (WBC) >= x ^ cells/mL White Blood Cell (WBC) ? cells/mm White blood cells (WBC) >= /mm^ within days of enrollment to study White blood cells (WBC) >= ,/mcL Circulating white blood cells < . /L (with or without use of hydroxycarbamide). White blood cells (WBC) =< x ^/L White blood cells (WBC) > , cells/mm^ White blood cells (WBC) >= ,/mcL White blood cells (WBC) >= /mm^ White blood cells (WBC) >= . x ^/L White blood cells >= /mm^ White blood cells (WBC) >= x ^ cells/ml White blood cells (WBC) >= ,/mcL White blood cells (WBC) > /mm^ White blood cells (WBC) < /mcl Within weeks of day : White blood cells (WBC) >= /mm^ White blood cells (WBC) > x^/L (measured within days prior to administration of study treatment) White blood cells (WBC) > . White blood cells (WBC) < . K/mcL White blood cell (WBC) >= cells/mm^ or >= . bil/L White blood cells (WBC) > /mm^ White blood cells (WBC) >= . x ^/L Within days of first vaccination: White blood cells (WBC) >= /mm^ White blood cells (WBC) >= /mm^ White blood cells (WBC) >= /mm^ White blood cells (WBC) >= /mm^ White blood cells (WBC) >= . White blood cells (WBC) >= ,/mm^ White blood cell (WBC) >= cells/mm^ or >= . bil/L White blood cells (WBC) >= . White blood cells (WBC) >= ,/mcL White blood cells (WBC) >= /mm^ White blood cells (WBC) >= ,/mm^ White blood cells (WBC) >= /mm^ White blood cells (WBC) >= /mm^ White blood cells (WBC) >= ,/mm^ Peripheral blood leukocyte count (white blood cells [WBC]) < /mm^. White blood cell (WBC) ? cells/mm^ ? weeks White blood cells (WBC) >= ,/mcL White blood cells (WBC) > /mcL DONOR: White blood cells (WBC), platelet count near normal limits ( %) White blood cells (WBC) >= /mm^ White blood cells (WBC) > x ^/L, measured within days prior to administration of study treatment White blood cells (WBC) of per mcL White blood cells (WBC) >= . x ^/L White blood cell (WBC) > , cells/mm^ White blood cells (WBC) > ,/mcL White blood cells (WBC) >= ,/mcL White blood cells (WBC) > . ml White blood cells (WBC) >= /mm^ White blood cells (WBC) >= . x ^ cells/L White blood cells (WBC) >= /mm^ within weeks of enrollment White blood cell (WBC) must be > cells/mm^ White blood cell (WBC) >= cells/mm^ or >= . bil/L White blood cell (WBC) >= cells/mm^ or >= . bil/L White blood cells (WBC) < . STEP ENROLLMENT AND RANDOMIZATION: white blood cells (WBC) >= ,/mm^ within weeks of study entry Patients receiving hydroxyurea may continue receiving it for up to days after the start of protocol treatment if white blood cells (WBC) > x^/L White blood cells (WBC) >= /mm^ White blood cells (WBC) < ,/mm^ White blood cells (WBC) >= /mm^ White blood cells (WBC) >= /mm^ DONOR: white blood cells (WBC) .-. x ^/mm^ White blood cells (WBC) >= /mm^ White Blood Cells (WBC) ? .xE/L including White blood cells (WBC) (> /mm^) White blood cells ? /L White blood cells (WBC) >= . White blood cells (WBC) < ./ml White blood cells (WBC) >= ,/mL White blood cells (WBC) >= , cells/mm^ White blood cells (WBC) >= /mm^ White blood cells (WBC) >= /mm^ White blood cells (WBC) < , White blood cells >= ,/mcL White blood cells (WBC) >= x ^/L, transfusions and growth factors are allowed Total white blood cells (WBC) >= . x ^/mcL within days prior to registration White blood cells >= ,/microliter White blood cells (WBC) within institutional limits of normal or judged to be not clinically significant by the investigator Peripheral blood white blood cells (WBC) greater than , per microliter (required for collection of dendritic cell precursors) White blood cells (WBC) >= /mm^