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Open Access

Peer-reviewed

Research Article

Racial Differences in the Human Endogenous Circadian Period

  • Mark R. Smith,

    Affiliation Biological Rhythms Research Laboratory, Department of Behavioral Sciences, Rush University Medical Center, Chicago, Illinois, United States of America

    ⨯
  • Helen J. Burgess,

    Affiliation Biological Rhythms Research Laboratory, Department of Behavioral Sciences, Rush University Medical Center, Chicago, Illinois, United States of America

    ⨯
  • Louis F. Fogg,

    Affiliation Biological Rhythms Research Laboratory, Department of Behavioral Sciences, Rush University Medical Center, Chicago, Illinois, United States of America

    ⨯
  • Charmane I. Eastman

    ceastman@rush.edu

    Affiliation Biological Rhythms Research Laboratory, Department of Behavioral Sciences, Rush University Medical Center, Chicago, Illinois, United States of America

    ⨯

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