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Sohl E, Heymans MW, de Jongh RT, den Heijer M, Visser M, Merlijn T, Lips P, van Schoor NM. Prediction of vitamin D deficiency by simple patient characteristics. The American Journal of Clinical Nutrition. 2014 May;99(5):1089–95. doi: 10.3945/ajcn.113.076430. |