CEBPA and non-small cell lung carcinoma: In long-observed model, we could not find the difference in survival time after urethane-injection and mitotic index in tumor cells between having and not having C/EBPα negative tumor in mice (data not shown), suggesting that C/EBPα silencing is not an only factor determining the lifetime risk due to lung malignancy, which is consistent with the previous study for NSCLC [10].