Supplementary Table S3 shows that these two genes share nine trans‐pQTL regions containing genes—PTPN22, GCKR, IL18R1, STAT4, CCR1, IFNG‐AS1, PTPN11, PTPN2, and TYK2—previously identified as associated with rheumatoid arthritis. This evidence concerns the gene CCR1 and rheumatoid arthritis.