Mean abnormal aneuploidy cell frequency (of a total 200 cells) and SD for the probes of CEP7, ELN, and D7S486/D7S522 in the control samples (left bar at each time point) and the G-CSF samples (right bar at each time point). Within each bar, the bottom part is for loss and the top part is for gain of signals; hence, the full length of the bar represents the frequency of any abnormal (gain/loss) cells. (A) Direct method. (B) Cultured method. *P < .05.