1 Guangzhou Medical University, 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, Guangdong 510000, China.
2 Graduate School, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 524003, China.
3 Graduate School, Guangzhou Medical University, Guangzhou, Guangdong 510000, China.
4 Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong 524003, China.