1 Department of Epidemiology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, People's Republic of China.
2 Center for Clinical Epidemiology and Evidence-based Medicine, Third Military Medical University, Chongqing, People's Republic of China.
3 Department of Thoracic Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing, People's Republic of China.
4 Breast Disease Center, Southwest Hospital, Third Military Medical University, Chongqing, 400038, People's Republic of China.
5 Department of Epidemiology, College of Preventive Medicine, Third Military Medical University, Chongqing, 400038, People's Republic of China. liyafei2008@hotmail.com.
6 Center for Clinical Epidemiology and Evidence-based Medicine, Third Military Medical University, Chongqing, People's Republic of China. liyafei2008@hotmail.com.