PRTN3 and vasculitis: We found that the impaired degradation of NETs weakly correlated inversely with the Birmingham Vasculitis Activity Score (BVAS), a clinical score that measures clinical activity of vasculitis (r = -0.582, P = 0.051), and with serum levels of anti-PR3, which are associated with disease activity (r = -0.627, P = 0.034) (Fig 5A).