Genes of interest are trafficking protein, kinesin binding 2 (Trak2) on chromosome 1 and TNF receptor–associated factor 6 (Traf6) on chromosome 2 because they were discovered together in several previously reported GWAS studies associated with atopic dermatitis, psoriasis, and rheumatoid arthritis [47–49]. This evidence concerns the gene TRAF6 and rheumatoid arthritis.