The FABP4 concentration in the conditioned medium (CM) of PCa cells obtained from the above experiments (measured by a human FABP4 specific ELISA kit) showed a high amount of FABP4 in PC-3 CM, but not in CM from LNCaP and DU145 cells (Supplementary Figure 1B). This evidence concerns the gene FABP4 and posterior cortical atrophy.