The CBD case demonstrated a significant reduction in striatal DAT binding, with symmetric losses in the caudate (right: 2.60; left: 2.53; z-score for both: −2.87 *) and putamen (right: 2.27, z-score: −3.03 **; left: 2.28, z-score: −4.19 **). This evidence concerns the gene SLC6A3 and red-green color blindness.