Peripheral blood CD34⁺ cell count after administration of G-CSF versus body weight. Peripheral blood CD34⁺ cell counts after G-CSF administration at 10 μg/kg per day were higher in donors who underwent (▲, solid trend line) collection of donor lymphocytes by large-volume leukapheresis before G-CSF administration compared with those who did not (◇, dashed trend line) undergo lymphocyte collection before the initiation of G-CSF administration. Data above are for those donors who underwent lymphocyte collection within 2 days of starting G-CSF.