From the 17 TS1 DMRs, 13 overlapped with probes present in the Illumina 450 K array; ten of the 13 overlapping DMRs are located within 200 bp of the differentially methylated probes identified after cell correction in our previous study of drug-naïve ACPA-positive RA (the EIRA cohort) using Illumina 450 K analysis [2]. This evidence concerns the gene PRTN3 and rheumatoid arthritis.