1. Department of Respiratory Medicine, Seventh People’s Hospital of Shanghai University of TCM, Datong Road, Shanghai 200137, People’s Republic of China
2. Department of Respiratory and Critical Care Medicine, Changhai Hospital, Naval Medical University, Changhai Road, Shanghai 200433, People’s Republic of China
3. Department of Respiratory and Critical Care Medicine, Shu Guang Hospital of Shanghai University of TCM, Shanghai 201203, People’s Republic of China
4. Department of Respiratory and Critical Care Medicine, General Hospital of Ningxia Medical University, Ningxia, People’s Republic of China
5. Department of Respiratory and Critical Care Medicine, Shanghai Ninth People’s Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China