IL17A and vitamin D deficiency: We also observed that baseline IL-17 levels correlated positively with baseline monocytes (R = 0.36, p = 0.003, Figure 4) in the whole study group independently on baseline 25(OH)D deficiency (R = 0.36, p = 0.032; R = 0.37, p = 0.038, respectively in subgroups with low and severe baseline vitamin D deficiency).