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This study database derives from Nutrition UP 65 study main database. The association between vitamin D levels and quartiles of functional parameters was evaluated. Database was prepared according to the recommendations accessed through the following reference: "Hrynaszkiewicz I, Norton ML, Vickers AJ, Altman DG. Preparing raw clinical data for publication: guidance for journal editors, authors, and peer reviewers.Trials. 2010;11:9".
The present project was granted in 85% by the Public Health Initiatives Programme (PT06, ref. 40NU05), financed by EEA Grants Financial Mechanism 2009-2014 and in 15% by the Faculty of Nutrition and Food Sciences, University of Porto, Portugal.
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