SWAP70 and hydrops fetalis: Moreover, SMR analysis suggested that the expression of SWAP70 was associated with the risk of RA (OR = 0.79, 95% CI = 0.68–0.91, P = 0.001) and two CVD traits (CAD: OR = 0.85, 95% CI = 0.80–0.91, P = 1.97 × 10−7; and HF: OR = 0.91, 95% CI = 0.86–0.96, P = 6.24 × 10−4), with no evidence of heterogeneity (P > 0.05, Additional file 1: Table S12).