CCL2 and endometriosis: 1,25(OH)2D3 treatment significantly reduced MCP‐1 gene expression in PBMCs of patients with and without endometriosis compared with untreated controls at 6 and 24 h (p < 0.01 and <0.05, respectively) and 48 h (p < 0.05; Figure 1Aa,b,c).