1. The First Affiliated Hospital of Guangzhou Medical UniversityGuangzhou, Guangdong, China
2. State Key Laboratory of Respiratory DiseaseGuangzhou, Guangdong, China
3. Guangzhou Institute of Respiratory DiseaseGuangzhou, Guangdong, China
4. National Clinical Research Center for Respiratory DiseaseGuangzhou, Guangdong, China
5. Central People's Hospital of ZhanjiangZhanjiang, Guangdong, China
6. Medical College of Jiaying UniversityMeizhou, Guangdong, China
7. The Second Affiliated Hospital of Guangdong Medical UniversityZhanjiang, Guangdong, China