CRP and adult-onset Still disease: Clinical features and laboratory parameters that were sensitive for establishing diagnosis of AOSD included high level of serum ferritin≥ the upper normal limit (97.7%), CRP≥ the upper normal limit (96%), D-dimer≥ the upper normal limit (92.1%), ESR≥ the upper normal limit (91.6%), and hyperpyrexia (≥39 °C, 90.4%) (Supplementary Table 2).