title: Preventive interventions for children at risk: introduction.
authors.affiliation: National Institute on Drug Abuse, Rockville, Maryland.
authors.forename: J L
authors.initials: JL
authors.lastname: Johnson
mesh_terms: D000293:Adolescent; D002648:Child; D015658:HIV Infections / Q000517:prevention & control; D006801:Humans; D010553:Personality Development; D012307:Risk Factors; D012931:Social Environment; D019966:Substance-Related Disorders / Q000517:prevention & control* / Q000534:rehabilitation