Levels of blood progenitor cells for patients treated with G-CSF alone (•, n = 18) or G-CSF plus SCF 10 μg/kd/d (n = 11) for 7 days (○), showing d7 GM-CFC (A), d14 GM-CFC (B), and BFU-E (C). Results are means of triplicate cultures. Median results are indicated for each cohort by horizontal line. Baseline values (day 1) were taken before administration of growth factors. Note the elevated levels of progenitor cells in the G-CSF plus SCF cohort despite similar levels at baseline.