Frequency of Leisure-Time Physical Activity and Serum 25-Hydroxyvitamin D Levels in the US Population: Results from the Third National Health and Nutrition Examination Survey

Scragg, Robert ; Camargo, Carlos A.

American journal of epidemiology, 2008-09, Vol.168 (6), p.577-586 [Periódico revisado por pares]

United States: Oxford University Press

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