Figure 3: Effects of calcium and vitamin D deficiency [CaD(−); dotted line] on plasma concentrations of 25-dihydroxyvitamin D [25(OH)D], (a), 1,25-dihydroxyvitamin D [1,25(OH)2D], (b), and parathyroid hormone (PTH, (c)) compared with a control group (C; solid line). Values are changes from baseline 0, with baseline values assigned to zero. Means and SEM, . For baseline values see Table 1. Significantly different from controls at a given time: ; ; ; . Significantly different from baseline: ; ; ; .