Demographical details, underlying diseases, and diagnostic procedures of the patients.

<p>* Vasculitis: Behcet’s disease, microscopic polyangiitis, granulomatosis with polyangiitis</p><p>** Other CTDs: Sjogren syndrome (SS), undifferentiated connective tissue disease (UCTD), mixed connective tissue disease, scleroderma</p><p># Immunosuppressive agents: cyclophosphamide, cyclosporin A, mycophenlatemofetil, and tripterygium glycosides</p><p>& Biological agents: ritaximab, and antitumor necrosis factor α(infliximab, entanercept)</p><p>Demographical details, underlying diseases, and diagnostic procedures of the patients.