Drug and alcohol use, problems and availability among students in Mexico and Canada.
D000293:Adolescent; D000428:Alcohol Drinking; D002170:Canada; D003469:Culture; D005260:Female; D006801:Humans; D013287:Illicit Drugs / Q000600:supply & distribution*; D008297:Male; D008800:Mexico; D010287:Parent-Child Relations; D004364:Pharmaceutical Preparations / Q000600:supply & distribution*; D012737:Sex Factors; D013334:Students; D019966:Substance-Related Disorders / Q000453:epidemiology*
D013287:Illicit Drugs; D004364:Pharmaceutical Preparations