Associations of peripheral blood CD34⁺ cell count after G-CSF administration (10 μg/kg per day) according to baseline pre–G-CSF blood platelet count and total mononuclear cell count. Peripheral blood CD34⁺ cell counts after G-CSF were higher in donors with higher pre–G-CSF blood platelet counts (A) and total mononuclear cell counts (B). In panels A and B, the response was steepest in Asian/Pacific donors (◇, short alternating with long dashed trend line). Lower responses were observed in white donors (□, solid trend lines) with intermediate levels in blacks (▲, dashed trend line) and Hispanic (●, dotted trend line) donors.