APOB and systemic lupus erythematosus: Egger's test revealed a substantial publishing bias in all the included individual publications for SLE and ApoB (P < 0.05; t = 3.77; Table 2) and OxLDL (P < 0.05; t = 4.41; Table 2), while Begg's test revealed no significant publication bias throughout the included articles (P > 0.05; Table 2).