CRP and polyarteritis nodosa: Serum CRP was higher in PAN [11.45 mg/l (1.2–41.9 mg/l); P = 0.0048] and RAS [7.25 mg/l (1.5–52.1 mg/l); P = 0.0091] groups compared with the control group [1 mg/ml (1–32.8 mg/ml)] (Fig.2).