While examing C1QA and C1QB mRNA expression in lung cancer, using Selamat's, Wachi's and Bhattacharjee's datasets, we found a lower expression level in adenocarcinoma (Figure 3C, p <0.05) and in squamous cell carcinoma (data not shown, p <0.05) than in normal lung tissue; C1QC mRNA expression was significant only in lung adenocarcinoma. Here, C1QA is linked to lung adenocarcinoma.