1. Department of Occupational and Environmental Health, School of Public Health, Wuhan University, Wuhan 430071, P. R. China
2. Institute of Global Health, Wuhan University, Wuhan 430071, P. R. China
3. Department of Thoracic Surgery, Beijing Chest Hospital, Capital Medical University, Beijing 101149, P.R. China
4. Wuhan Hospital for the Prevention and Treatment of Occupational Diseases, Wuhan 430071, P. R. China
5. Department of Thoracic Surgery, People's Hospital of Wuhan University, Wuhan 430000, P. R. China