From the Centers for Disease Control and Prevention. Trends in blood lead levels among children--Boston, Massachusetts, 1994-1999.
D001900:Boston / Q000453:epidemiology; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007854:Lead / Q000097:blood; D007855:Lead Poisoning / Q000097:blood / Q000453:epidemiology*
D007854:Lead