CD34⁺ cell yields (median, 25th, and 75th percentiles) from 3 days of leukapheresis for each treatment group. Section I includes the 7-day treatment groups, section II the 20 μg/kg/d SCF and filgrastim groups, and section III the 13-day treatment groups. Only 3 patients received 30 μg/kg/d SCF and filgrastim (H); their individual CD34⁺ cell yields were 1.43, 5.20, and 8.52 × 10⁶/kg. *P < .05, comparing all other treatment groups with the filgrastim alone groups (A and B).