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Authors' Response

Hartley, Tara A. PhD, MPA, MPH; Burchfiel, Cecil M. PhD, MPH; Fekedulegn, Desta PhD; Andrew, Michael E. PhD; Shankar, Anoop MD, PhD; Knox, Sarah S. PhD; Violanti, John M. PhD

Journal of Occupational & Environmental Medicine: March 2012 - Volume 54 - Issue 3 - p 274–275
doi: 10.1097/JOM.0b013e31823402e3
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