. "Appendix I: Proportion of the Population Above and Below 40 nmol/L Serum 25-Hydroxyvitamin D Concentrations and Cumulative Distribution of Serum 25-Hydroxyvitamin D Concentrations: United States and Canada." Dietary Reference Intakes for Calcium and Vitamin D. Washington, DC: The National Academies Press, 2011.
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DRI Dietary Reference Intakes Calcium Vitamin D
FIGURE I-14 Cumulative distribution of serum 25OHD for 71- to 79-year-olds in Canada for the 2007 to 2009 time period.