title: The old "ounce of prevention".
authors.forename: R B
authors.initials: RB
authors.lastname: Heyman
mesh_terms: D000293:Adolescent; D002648:Child; D006801:Humans; D010372:Pediatrics; D010819:Physician's Role; D012307:Risk Factors; D012309:Risk-Taking; D019966:Substance-Related Disorders / Q000517:prevention & control*