Etiology Investigation in Non-smoking Female Lung Cancer
The project of Etiology Investigation in Non-smoking Female Lung Cancer(NFLC) is a multicenter case-control study . It aimed to investigate the lung cancer etiology of Chinese population. It was conducted in several investigation centers across south, north, and center of China. Newly diagnosed lung cancer patients were recruited in this study. Controls with any cancer were matched by age and the same hospital visiting.