title: Multiple drug use: a symptomatic behavior.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D003415:Crime; D003866:Depressive Disorder / Q000523:psychology; D004522:Educational Status; D005260:Female; D006801:Humans; D008297:Male; D012737:Sex Factors; D019966:Substance-Related Disorders / Q000523:psychology*