Lead exposure and an ALAD polymorphism in relation to multiple cognitive functions.

Rajan P, Kelsey KT, Schwartz J, Bellinger DC, Weuve J, Spiro A 3rd, Sparrow D, Smith TJ, Nie H, Weisskopf MG, Hu H, Wright RO. Interaction of the δ-aminolevulinic acid dehydratase (ALAD) polymorphism and lead burden on cognitive function: the Normative Aging Study. Journal of Occupational and Environmental Medicine 2008;50:1053-1061.

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Lead exposure and an ALAD polymorphism in relation to psychiatric symptoms.

Rajan P, Kelsey KT, Schwartz JD, Bellinger DC, Weuve J, Sparrow D, Spiro A 3rd, Smith TJ, Nie H, Hu H, Wright RO.  Lead burden and psychiatric symptoms and the modifying influence of the delta-aminolevulinic acid dehydratase (ALAD) polymorphism: the VA Normative Aging Study. Am J Epidemiol 2007;166:1400-1408.