Absolute neutrophil count (ANC) >= 1,500/mm^3 obtained =< 21 days prior to registrationXx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,800 cells/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,800 cells/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXWithin 60 days prior to registration on study: Absolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1200/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,200 cells/mm^3, within 21 days prior to study entryXx_NEWLINE_xXWithin 14 days prior to registration: Absolute neutrophil count (ANC) >= 1,000 cells/mm^3 without growth factor supportXx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500 cells/mm^3; obtained within 14 days prior to study entryXx_NEWLINE_xXSTEP I: Absolute neutrophil count >= 1000 cells/mm^3 (obtained within 28 days prior to randomization)Xx_NEWLINE_xXObtained =< 7 days prior to registration: Absolute neutrophil count (ANC) >= 1500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,800 cells/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,000 cells/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) > 1,000/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500 cells/mm^3 obtained within 30 days prior to registrationXx_NEWLINE_xXAbsolute neutrophil count (ANC) > 750 cells/mm^3 within 90 days prior to randomizationXx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1500 cells/mm^3 within 14 days prior to study registrationXx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500 cells/mm^3, within 21 days prior to registrationXx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 500 cells/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500 cells/m^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,000/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500 cells/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 500 cells/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) > 1500 mm^3, must be obtained within 8 weeks prior to screening for protocol therapyXx_NEWLINE_xXELIGIBILITY CRITERIA FOR RANDOMIZATION (STEP 1): Absolute neutrophil count (ANC) > 1500 mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1500/mm^3Xx_NEWLINE_xXWithin 6 weeks prior to randomization: Absolute neutrophil count (ANC) must be >= 1200/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXRe-registration: ANC >= 1,500/mm^3Xx_NEWLINE_xXWithin 14 days of registration: Absolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) must be >= 1200/mm^3 within 28 days before randomizationXx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC): >= 1,500 /mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1500 mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 750/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,000 cells/mm^3Xx_NEWLINE_xXAbsolute neutrophil count (ANC) >= 1,500 cells/mm^3Xx_NEWLINE_xX