title: Letter: Lead and intelligence.
mesh_terms: D002648:Child; D002675:Child, Preschool; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007360:Intelligence / Q000187:drug effects*; D007854:Lead / Q000097:blood / Q000633:toxicity*; D009435:Synaptic Transmission / Q000187:drug effects
chemical_list: D007854:Lead