1. Department of Respiratory Disease, Xinqiao Hospital, Third Military Medical University, Chongqing, China
2. Department of Thoracic Surgery, Xinqiao Hospital, Third Military Medical University, Chongqing, China
3. Department of Systems Biology, UT MD Anderson Cancer Center, Houston, TX, USA
4. Department of Epidemiology, College of Preventive Medicine, Third Military Medical University, Chongqing, China