title: Letter: Lead in water and mental retardation.
mesh_terms: D002648:Child; D006801:Humans; D008607:Intellectual Disability / Q000209:etiology*; D007854:Lead / Q000633:toxicity*; D014852:Wales; D014873:Water Pollutants / Q000633:toxicity*; D014874:Water Pollutants, Chemical / Q000633:toxicity*; D014881:Water Supply
chemical_list: D014873:Water Pollutants; D014874:Water Pollutants, Chemical; D007854:Lead