Variation in the human cannabinoid receptor CNR1 gene modulates gaze duration for happy faces

Variation in the human cannabinoid receptor CNR1 gene modulates gaze duration for happy faces

http://theroc.us/researchlibrary/Variation%20in%20the%20human%20cannabinoid%20receptor%20CNR1%20gene%20modulates%20gaze%20duration%20for%20happy%20faces.pdf