title: Lead study results questioned.
mesh_terms: D000367:Age Factors; D002675:Child, Preschool; D003071:Cognition; D002658:Developmental Disabilities / Q000503:physiopathology*; D006801:Humans; D007360:Intelligence; D007854:Lead / Q000097:blood*; D007858:Learning
chemical_list: D007854:Lead