KIR3DL2 and systemic lupus erythematosus: Moreover, many studies have identified more than 30 robust genetic associations with SLE including killer cell immunoglobulin-like receptors (KIRs), IRF5, STAT4, PTPN22, TNFAIP3, BLK, BANK1, TNFSF4, and ITGAM. [5]