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. 2011 May 25;6(5):e20433. doi: 10.1371/journal.pone.0020433

Figure 1. Sera measurement of 25-hydroxyvitamin D (25(OH)D) level (in nmol/L) in patients with narcolepsy-cataplexy and age- and gender-matched normal controls.

Figure 1

Results are shown as a box-whisker plot, with median and 25th quartile of 25(OH)D. We noted significantly lower level in patients compared to controls (P = 0.0039).