title: Letter: Blood-lead levels, behavior, and intelligence.
mesh_terms: D002490:Central Nervous System / Q000187:drug effects; D002648:Child; D002653:Child Behavior Disorders / Q000097:blood / Q000139:chemically induced*; D002657:Child Development / Q000187:drug effects; D002662:Child Health Services; D002675:Child, Preschool; D004781:Environmental Exposure; D005260:Female; D006306:Health Surveys; D006801:Humans; D007360:Intelligence; D007854:Lead / Q000097:blood* / Q000494:pharmacology; D007855:Lead Poisoning / Q000150:complications*; D008131:London; D008297:Male; D012924:Social Conditions; D014505:Urban Population
chemical_list: D007854:Lead