Kwon YC et al. identified SLAMF6 as new RA-associated loci, and found that A variant of SLAMF6 (rs148363003) interacts with other SLAMF coding genes including SLAMF1, SLAMF2, SLAMF3, SLAMF5, SLAMF7 on chromosome 1. Here, CD84 is linked to rheumatoid arthritis.