Mean levels of blood white cell counts and progenitor cells for patient cohorts treated with G-CSF alone (•, n = 18), SCF 5 μg/kg/d plus G-CSF (○, n = 5), SCF 10 μg/kg/d plus G-CSF (▪, n = 11), or SCF 15 μg/kg/d plus G-CSF (□, n = 10). Results are also shown for the patient cohort that received SCF pretreatment for 3 days and 7 days concurrent treatment with G-CSF (▴, n = 18). Time is shown relative to the commencement of G-CSF. Results shown are white cell count (A), d7 GM-CFC (B), d14 GM-CFC (C), and BFU-E (D).