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Death Rates Among Physically Active and Sedentary Employees of the Railroad Industry Henry Longstreet Taylor, Ernest Klepetar, Ancel Keys, Willis Parlin, Henry Blackburn, and Thomas Puchner CopyRight https://doi.org/10.2105/AJPH.52.10.1697 Published Online: August 29, 2011
Taylor et al. (Mon,) studied this question.
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