1. Department of Respiratory Medicine, National Key Clinical Specialty, Branch of National Clinical Research Center for Respiratory Disease, Xiangya Hospital, Central South University, Changsha, Hunan, China
2. Center of Respiratory Medicine, Xiangya Hospital, Central South University, Changsha, Hunan, China
3. Clinical Research Center for Respiratory Diseases in Hunan Province, Changsha, Hunan, China
4. Hunan Engineering Research Center for Intelligent Diagnosis and Treatment of Respiratory Disease, Changsha, Hunan, China
5. National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
6. Department of Infection Control Center, Xiangya Hospital, Central South University, Changsha, Hunan, China