CCL2 and female reproductive organ cancer: The meta-analysis showed that CCL2-2518A/G (rs1024611) polymorphism is associated with risk of gynecological cancer (GG vs AG + AA, OR = 1.55, 95%CI = 1.07–2.24, P < 0.05; AA vs GG, OR = 0.59 95%CI = 0.38–0.92, P < 0.05).