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. 2013 Nov 11;98(12):E1946–E1950. doi: 10.1210/jc.2013-3105

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Copyright © 2013 by The Endocrine Society

This article has been published under the terms of the Creative Commons Attribution License (CC-BY), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Copyright for this article is retained by the author(s). Author(s) grant(s) the Endocrine Society the exclusive right to publish the article and identify itself as the original publisher.

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Figure 1. — Calcium concentrations by age and 25(OH)D. A, Calcium concentrations (nanograms per deciliter) in unselected subjects compared with subjects not on the endocrine unit, not on the renal unit, and not in an ICU with 25(OH)D between 20 and 80 ng/mL. B, Calcium concentrations (nanograms per deciliter) eliminating patients with endocrine or renal diagnoses, and in ICUs stratified by 25(OH)D. C, Unselected subjects with fitted dose-response curve; this curve revealed an inflection point at 28.4 with 95% confidence intervals ranging from 27.7 to 29.0, and an R² value of 0.022.