[Prevalence of drugs in 2462 school girls and boys in Essen high schools].
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002188:Cannabis; D000431:Ethanol; D005260:Female; D005860:Germany, West; D006801:Humans; D008297:Male; D012572:School Health Services; D019966:Substance-Related Disorders / Q000453:epidemiology*
D000431:Ethanol
Untersuchung zur Praevalenz von Drogen unter 2462 Schülerinnen und Schülern an Essener Oberschulen.