Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
25 Hydroxyvitamin D3 [25(OH)D3] and 1,25 dihydroxyvitamin D3 [1,25(OH)2D3] plasma levels, divided according to the four seasons: spring (April–June, n = 32), summer (July–September, n = 21), autumn (October–December, n = 34) and winter (January–March, n = 25). Data are represented as box and whiskers (range). P-values calculated using the Kruskal–Wallis test with Dunn's post-hoc test (* indicates P < 0·05).
