1. Department of Infectious DiseaseBeijing Anzhen Hospital, Capital Medical UniversityBeijing China
2. Department of Respiratory and Critical Care MedicineBeijing Chao‐Yang Hospital, Capital Medical UniversityBeijing China
3. Department of Pulmonary and Critical Care MedicineCenter for Respiratory Diseases, China‐Japan Friendship Hospital; National Clinical Research Center for Respiratory DiseasesBeijing China