title: Preface. Substance use and abuse among adolescents.
authors.forename: Robert T
authors.initials: RT
authors.lastname: Brown
authors.forename: Sheryl
authors.initials: S
authors.lastname: Ryan
mesh_terms: D000293:Adolescent; D003469:Culture; D006801:Humans; D019966:Substance-Related Disorders / Q000453:epidemiology*; D014481:United States / Q000453:epidemiology