CNR1 and red-green color blindness: Two-way ANOVA [stress × drug (2 × 2)] revealed significant effects of stress (males: F(1,35) = 17.396, p < 0.001; females: F(1,34) = 17.912, p < 0.001) but not of the drug factor (males: F(1,35) = 0.011, ns; females: F(1,34) = 0.098, ns) or stress × drug interactions (males: F(1,35) = 0.072, ns; females: F(1,34) = 0.019, ns), suggesting that UCMS led to the downregulation of cnr1 regardless of CBD treatment.