1. Department of Pulmonary and Critical Care Medicine, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, P.R.China
2. Department of Respiratory Medicine, People’s Hospital of Ningxia Hui Autonomous Region, Yinchuan, P.R.China
3. Department of Internal Medicine, Shanghai Electric Power Hospital, Shanghai, P.R.China
4. Department of Respiratory Medicine, Nanjing Lishui people’s Hospital, Lishui, Nanjing, P.R.China
5. Department of Pharmacy, Shanghai Jiao Tong University, Shanghai, P.R.China
6. Department of Radiology, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, P.R.China
7. Statistics Center, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, P.R.China