APOH and rheumatoid arthritis: Interestingly, cross‐reactive epitopes on β2GPI and the phosphopeptidomannan part of the cell wall of Saccharomyces cerevisiae have been described.33 In the same way, we have previously demonstrated a high frequency of ASCA in patients with aβ2GPI.18 So could we imagine that aβ2GPI, that we have detected in RA in the present study, are ASCA and are implicated in the pathogenesis of RA?