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Chronobiology International
The Journal of Biological and Medical Rhythm Research
Volume 29, 2012 - Issue 8
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Research Article

Blacks (African Americans) Have Shorter Free-Running Circadian Periods Than Whites (Caucasian Americans)

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Pages 1072-1077 | Received 10 Mar 2012, Accepted 31 May 2012, Published online: 16 Aug 2012

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