TNFSF13B and systemic lupus erythematosus: We examined the same SNPs of the BAFF promoter region (rs9514827, rs3759467, rs1041569, rs9514828) as had been previously studied by Eilertsen [38] and Fabris [39] and colleagues, who had investigated these SNPs in the systemic lupus erythematosus and rheumatoid arthritis, respectively.