Figure 2.

The figures show the meta-analysis of studies from the systematic review.

Left Panel—Two studies with biological flaws were combined, Dumville et al. [43] and Sanders et al. [47];

Right Panel—Two studies without biological flaws were combined, Jorde et al. [37] and Khoraminya et al. [49], showing two intervention groups for Jorde et al. [37] (high and low dose Vitamin D) and the data from the Khoraminya et al. [49] at 2, 4, 6, and 8 weeks.