The largest GWAS (genome-wide association study) of SLE (systemic lupus erythematosus) to date has mapped 43 identified loci, including 10 new variants (mostly in enzyme genes). Of note, 16 of the SLE-linked genes encode transcription factors—more than would be expected by chance. The researchers genotyped 7,219 patients and 15,991 healthy controls of European ancestry for this new GWAS and supporting studies.