title: [Prevention of substance abuse: randomised or observational evaluation is absolutely needed].
authors.forename: Fabrizio
authors.initials: F
authors.lastname: Faggiano
mesh_terms: D006801:Humans; D015397:Program Evaluation; D016032:Randomized Controlled Trials as Topic; D019966:Substance-Related Disorders / Q000517:prevention & control*
vernacular_title: Prevención del consumo de sustancias: la absoluta necesidad de una evaluación aleatorizada u observacional.