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. 2018 Aug 29;11:619. doi: 10.1186/s13104-018-3725-7

Fig. 2.

Fig. 2

Correlation between a free 25-hydroxyvitamin D (25-OHD) and b 25-OHD and between free 25-OHD and vitamin D binding protein (VDBP) in plasma samples from the original study at baseline and after 6 months (n = 118)