1 Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China.
2 State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Institute of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou, Guangdong, China.
3 Department of Respiratory and Critical Care Medicine, Guangzhou University of Chinese Medicine, Guangzhou, China.
4 Department of Nephrology, The Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China; *Contributed equally.