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Number of participants who reported any lifetime use of cannabis, versus no lifetime use of cannabis, in the PDYN SS+SL genotype, compared to the LL genotype.
Note: Data are stratified by gender: (A) males; (B) females.
Abbreviations: LL, long–long; NS, not significant; PDYN, prodynorphin; SL, short–long; SS, short–short.
