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Journal of Occupational & Environmental Medicine:
doi: 10.1097/JOM.0b013e31825cb7c4
Letters to the Editor

Ecological Bias and Data Entry Errors: A Reply to Hendryx and Ahern

Borak, Jonathan MD; Slade, Martin D. MPH; Allen, Richard Read MS; Salipante-Zaidel, Catherine MEM; Fields, Cheryl A. MPH

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