RA and T1D were already known to have two disease susceptibility genes in common: at the MHC, and PTPN22. As detailed elsewhere, our study provides data indicating that this list can be extended to include variants around IL2RA (chromosome 10p15), PTPN2 (chromosome 18p11) and the chromosome 12q24 region (Supplementary Table 11), all apparently novel in RA.
