1. Department of Pulmonary and Critical Care MedicineBeijing Chao‐Yang HospitalCapital Medical University Beijing China
2. Department of Pulmonary and Critical Care MedicineInner Mongolia Autonomous Region People's Hospital Hohhot China
3. Department of Pulmonary and Critical Care MedicineCenter of Respiratory MedicineChina–Japan Friendship HospitalNational Clinical Research Center for Respiratory Diseases Beijing China
4. Department of Respiratory MedicineZhengzhou Central Hospital Zhengzhou China