Figure 1From: Prognostic value of immunohistochemical surfactant protein A expression in regenerative/hyperplastic alveolar epithelial cells in idiopathic interstitial pneumoniasRelation of SP-A expression in regenerative/hyperplastic alveolar epithelial cells to prognosis of IIPs in all patients. SP-A positive ratio = number of SP-A positive epithelial cells/total number of alveolar epithelial cells in studied areas × 100.Back to article page