1. Emergency Department of China Rehabilitation Research Center, Capital Medical University, Beijing, China
2. Department of Epidemiology and Health Statistics, School of Public Health, Capital Medical University, Beijing, China
3. Department of Critical Care Medicine, Xuan Wu Hospital, Capital Medical University, Beijing, China
4. Medical Intensive Care Unit, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China
5. Department of Critical Care Medicine, Fu Xing Hospital, Capital Medical University, Beijing, China