G-CSF + AMD3100 yields leukapheresis products with a higher content of both conventional and regulatory T-cell populations compared with those resulting from treatment with G-CSF alone. The fold change of the lymphocyte populations was determined by comparing the absolute numbers mobilized with G-CSF alone (red, averaged and normalized to 1) with the absolute numbers of these cells mobilized into the apheresis products with either AMD3100 alone (blue) or G-CSF plus AMD3100 (green). Values were log-transformed and compared with the corresponding values obtained with G-CSF alone using the Student t test. ns indicates not significant (P > .1). ^P < .1. *P < .05. **P < .01. ***P < .001.