TNF and pelvic inflammatory disease: The aim of this study was to evaluate the association between TNF-α (−308 G > A), IL-10 (−1082 A > G), IL-10 (−819 C > T), and IL-10 (−592 A > C) polymorphisms and PID susceptibility with more studies and the addition of two new polymorphisms (IL-10 (−819 C > T) and IL-10 (−592 A > C)), meta-regression, and trial sequential analysis (TSA) compared to two previous meta-analyses.