title: The non-medical use of psychoactive substances among secondary school male students in Egypt: an epidemiological study (a brief report).
mesh_terms: D000293:Adolescent; D004534:Egypt; D006801:Humans; D011619:Psychotropic Drugs; D012907:Smoking; D019966:Substance-Related Disorders / Q000453:epidemiology*
chemical_list: D011619:Psychotropic Drugs