1. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Naval Medical University, Shanghai, China
2. Department of Respiratory and Critical Care Medicine, No. 906 Hospital of the Chinese People’s Liberation Army Joint Logistic Support Force, Ningbo, China
3. Nursing Department, The First Affiliated Hospital of Naval Medical University, Shanghai, China
4. Department of Anesthesiology, The First Affiliated Hospital of Naval Medical University, Shanghai, China
5. Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Naval Medical University, No. 168 Changhai Road Yangpu District Shanghai 200433, China