1. Department of Critical Care Medicine, Peking University People's Hospital, Beijing, China.
2. Division of Respiratory Care, Department of Cardiopulmonary Sciences, Rush University Medical Center, Chicago, Illinois, USA.
3. Department of Critical Care Medicine, Binzhou People's Hospital, Binzhou, China.
4. Department of Critical Care Medicine, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.
5. Department of Surgical Intensive Care Unit, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
6. Department of Respiratory and Critical Care Medicine, The Central Hospital of Wuhan, Wuhan, China.
7. Department of Respiratory and Critical Care Medicine, Union Hospital Affiliated with Tongji Medical College of Huazhong University of Science and Technology, Wuhan, China.
8. Department of Critical Care Medicine, People's Hospital of Jianghua Yao Autonomous County, Yongzhou, China.
9. Department of Respiratory and Critical Care Medicine, Jinling Hospital, Nanjing, China.
10. Department of Respiratory and Critical Care Medicine, The Second Xiangya Hospital of Central South University, Changsha, China.
11. Department of Emergency Critical Care Medicine, West China Hospital Sichuan University-Ziyang Hospital, Ziyang, China.
12. Department of Critical Care Medicine, Zhangzhou Hospital Traditional Chinese Medicine, Zhangzhou, China.
13. Department of Respiratory and Critical Care Medicine, West China Medical Center, Sichuan University, Chengdu, China.
14. Department of Respiratory and Critical Care Medicine, The First Hospital of China Medical University, Shenyang, China.
15. Department of Critical Care Medicine, Yixing No.2 People's Hospital, Yixing, China.
16. Department of Critical Care Medicine, Gansu Second Provincial People's Hospital, Lanzhou, China.
17. Department of Critical Care Medicine, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China.
18. Department of Respiratory and Critical Care Medicine, Shanghai Changhai Hospital, Shanghai, China.
19. Department of Cardiac Surgery, Southwest Hospital, The First Hospital Affiliated to Army Medical University, Chongqing, China.