Relative gene expression of adrenal cortical markers in retrieved implants. Implants were retrieved on days 10, 28, and 56. (A) Relative gene expression levels of cells before implantation. (B–D) Relative gene expression levels of implants on days 10, 28, and 56, respectively. The relative expression level of each adrenal-specific gene was normalized to that of the control group from the same time point. The gene expression of the high bFGF group was compared to that of the control and low bFGF groups. The gene expression of the low bFGF group was compared to that of the control group. *p < 0.05 as compared to the control group, and #p < 0.05 as compared to the low bFGF group. Error bar represents standard deviation of measurements of retrieved implants from three animals.