1 Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, No. 36, Sanhao Street, Shenyang, China.
2 Occupational Disease and Occupational Health Prevention and Control Institute, Liaoning Center for Disease Control and Prevention, Shenyang, Liaoning, China.
3 Department of Emergency Medicine, Shengjing Hospital of China Medical University, No. 36, Sanhao Street, Shenyang, China.
4 Department of Emergency Medicine, Shengjing Hospital of China Medical University, No. 36, Sanhao Street, Shenyang, China. Electronic address: jiadong0101@126.com.