Results from immunohistochemistry (IHC) and integrated optical density (IOD) analysis with NSCLC tissue arrays of tumor and normal lung tissues (Cohort 3) confirmed that the protein levels of CCL7 were higher in tumor tissues than in the normal lung tissues (Fig. 1c, Supplementary Data 1 and Supplementary Table 4). The gene discussed is CCL7; the disease is non-small cell lung carcinoma.