1. Department of Thoracic Surgery , National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, , Beijing 100021 , China
2. Chinese Academy of Medical Sciences and Peking Union Medical College , National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, , Beijing 100021 , China
3. Department of Medical Oncology , National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, , Beijing 100021 , China
4. Xiangya School of Medicine, Central South University , Changsha 410013, No. 172, Tongzipo Road, Yuelu District, Hunan , China
5. Bloomberg School of Public Health , Epidemiology, , Baltimore, MD 21205 , United States
6. Johns Hopkins University , Epidemiology, , Baltimore, MD 21205 , United States