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. 2022 Mar 21;3(3):261–267. doi: 10.1302/2633-1462.33.BJO-2022-0004.R1

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© 2022 Author(s) et al.

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Fig. 3 — The serum 25-hydroxyvitamin-D levels (25(OH)D) according to each season are shown in box plots. Spring, March to May; summer, June to August; autumn, September to November; and winter, December to February.