title: Effectiveness of drug education programs for secondary school students.
mesh_terms: D000293:Adolescent; D003479:Curriculum; D005500:Follow-Up Studies; D006266:Health Education; D006801:Humans; D012572:School Health Services; D019966:Substance-Related Disorders / Q000517:prevention & control*; D011795:Surveys and Questionnaires; D013997:Time Factors