To the Editor We appreciate the editorial by DeKosky and Gandy1 accompanying our article2 describing the association of serum dichlorodiphenyldichloroethylene (DDE) levels and Alzheimer disease (AD). While we wholeheartedly agree with the authors in calling for additional study on environmental factors in AD, there are some clarifications that we would like to make.
Richardson JR, German D, Levey A. Alzheimer Disease Risk Factors. JAMA Neurol. 2014;71(8):1051. doi:10.1001/jamaneurol.2014.1525
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