The marijuana problem in perspective.
D000293:Adolescent; D000328:Adult; D000368:Aged; D001290:Attitude; D002188:Cannabis; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008887:Military Medicine; D009042:Motivation; D009426:Netherlands; D019966:Substance-Related Disorders; D014481:United States