1. Department of Critical Care Medicine, Guangdong Provincial Geriatrics Institute, Guangdong Provincial People's Hospital Guangdong Academy of Medical Sciences Guangzhou China
2. Department of Cardiology, Guangdong Cardiovascular Institute, Guangdong Provincial Key Laboratory of Coronary Heart Disease Prevention, Guangdong Provincial People's Hospital Guangdong Academy of Medical Sciences Guangzhou China
3. Shantou University Medical College Shantou China
4. Department of Critical Care Medicine The First People's Hospital of Jingzhou Jingzhou China
5. Department of Respiratory and Critical Care Medicine The First People's Hospital of Shaoguan Shaoguan China
6. Emergency Center The First Affiliated Hospital of Yangtze University Jingzhou China