title: Letters to the editor: On "maturational lag".
mesh_terms: D001289:Attention Deficit Disorder with Hyperactivity; D002658:Developmental Disabilities; D004292:Dominance, Cerebral; D004410:Dyslexia / Q000209:etiology*; D004777:Environment; D007839:Functional Laterality; D006801:Humans; D007859:Learning Disabilities / Q000209:etiology*; D012959:Socioeconomic Factors