The radiographic progression of lung fibrosis of our ILD population (COP, sarcoidosis and IPF in combination) and after oral corticosteroid (post-OCS CXR CFB) was positively associated with IL-17 expression and GR-β OD/GR-α OD ratio, as well as GR-β expression (Table 3). The gene discussed is IL17A; the disease is idiopathic pulmonary fibrosis.