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American Journal of Epidemiology Advance Access published online on June 25, 2008
American Journal of Epidemiology, doi:10.1093/aje/kwn166
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American Journal of Epidemiology © The Author 2008. Published by the Johns Hopkins Bloomberg School of Public Health. All rights reserved. For permissions, please e-mail: journals.permissions@oxfordjournals.org.

Scragg and Camargo Respond to "Physical Activity and Vitamin D"

Robert Scragg1 and Carlos A. Camargo, Jr2

1 School of Population Health, University of Auckland, Auckland, New Zealand
2 Massachusetts General Hospital, Harvard Medical School, Boston, MA

Correspondence to Dr. Robert Scragg, School of Population Health, The University of Auckland, Private Bag 92019, Auckland 1142, New Zealand (e-mail: r.scragg@auckland.ac.nz).

Received for publication May 6, 2008. Accepted for publication May 8, 2008.

The first 10% of the full text of this article appears below.

We appreciate the thoughtful comments by Drs. Birrell and Francis (1) about our article (2) based on data from the Third National Health and Nutrition Examination Survey (NHANES III). We agree that it is most likely that we have underestimated the strength of the positive association between outdoor activity and serum 25-hydroxyvitamin D because of . . . [Full Text of this Article]


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