1. Department of Respiratory and Critical Care MedicineThe Second Xiangya Hospital of Central‐South University Changsha Hunan China
2. Research Unit of Respiratory DiseaseCentral‐South University Changsha Hunan China
3. The Respiratory Disease Diagnosis and Treatment Center of Hunan Province Changsha Hunan China
4. Department of Respiratory and Critical Care MedicineThe First Hospital of Changsha Changsha Hunan China
5. Department of Infectious DiseaseThe First Hospital of Changsha Changsha Hunan China
6. Department of Pediatricsthe First Hospital of Changsha Changsha Hunan China