Journal of the American College of Nutrition -- Heaney et al. 22 (2): 142 Figure 2

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Fig. 2. Time course of the mean increment in serum total calcium in two studies, in one of which vitamin D status was elevated ("D+"), and in the other, it was not ("D-"). Error bars are 1 SEM. (Copyright Robert P. Heaney, 2002. Used with permission.)