1. The Second Affiliated Hospital of Guangdong Medical University Zhanjiang Guangdong China
2. Affiliated Hospital of Guangdong Medical University Zhanjiang Guangdong China
3. State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory Disease Guangzhou Institute of Respiratory Health The First Affiliated Hospital of Guangzhou Medical University Guangzhou Medical University Guangzhou Guangdong China
4. Central Hospital of Guangdong Nongken, Zhanjiang, Guangdong, China Zhanjiang Guangdong China