title: Logical problems in contemporary cannabis research.
mesh_terms: D002188:Cannabis; D003417:Criminal Psychology; D003431:Cross-Cultural Comparison; D004335:Drug and Narcotic Control; D005260:Female; D006801:Humans; D007880:Legislation, Drug; D008297:Male; D011605:Psychoses, Substance-Induced / Q000209:etiology; D012106:Research; D012107:Research Design; D019966:Substance-Related Disorders / Q000145:classification / Q000209:etiology; D006113:United Kingdom; D014481:United States