showed a trendp = 0.06
Correlation analysis of IL40 serum levels measured by Mybiosource for the six preselected RA patients showed a trend for a correlation with hallmark RA autoantibodies RF IgM ( r = 0.83, p = 0.06), RF IgG ( r = 0.83, p = 0.06), RF IgA ( r = 0.71, p = 0.14) and anti‐CCP2 IgG ( r = 0.77, p = 0.11) (Figure S1 ).