Therefore, there is great variability in the mean percentages of ADAs, as reported by Strand et al., for example, ETA-ADAs serum levels in RA patients were found to be about 0–13%, 0% in PsA, 0–6% in JIA, 0% in AS and 2–5% in AS [5]. The gene discussed is AGPS; the disease is juvenile idiopathic arthritis.