Recent trends in cannabis use in Canada.
D000293:Adolescent; D000328:Adult; D002170:Canada; D002188:Cannabis; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013334:Students / Q000523:psychology; D019966:Substance-Related Disorders / Q000453:epidemiology*