Inconsistencies in the lead-effects literature exist and cannot be explained by "effect modification".
Ernhart
C B
CB
Department of Psychiatry, Case Western Reserve University, Cleveland, OH 44109-1998, USA.
D002648:Child; D002658:Developmental Disabilities / Q000139:chemically induced* / Q000235:genetics / Q000523:psychology*; D005260:Female; D006801:Humans; D007361:Intelligence Tests; D007855:Lead Poisoning / Q000523:psychology*; D008297:Male; D015201:Meta-Analysis as Topic; D012107:Research Design; D012737:Sex Factors; D012959:Socioeconomic Factors