TNFRSF11B and rheumatoid arthritis: Further analysis revealed CG genotype of the rs2073618 OPG variant as a protective contributor against RA development in codominant and overdominant models (adjustment for age and gender ORs [95% CI] 0.54 [0.35–0.84], p-value: 0.017 and 0.57 [0.38–0.84], p-value: 0.0048, respectively).