CNR1 and major depressive disorder: Moreover, the case–control t‐map for MDD subtype 2 showed significant associations with several neurotransmitters: 5‐HT1a (β = −0.08, p = 0.005), D1 (β = 0.40, p = 0.001), FDOPA (β = −0.54, p < 0.001), GABAa (β = −0.27, p = 0.036), NMDA (β = 0.39, p < 0.001), mGluR5 (β = 0.48, p < 0.001), and CB1 (β = −0.62, p < 0.001).