Fig. 2From: Serum SP-A and KL-6 levels can predict the improvement and deterioration of patients with interstitial pneumonia with autoimmune featuresReceiver-operating characteristic (ROC) curve according to the specificity and sensitivity of serum SP-A and KL-6 levels. SP-A, surfactant protein-A; KL-6, Krebs von den Lungen-6Back to article page