1. State Key Laboratory of Respiratory Disease, National Center for Respiratory Diseases, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou 510120, China
2. Harbin Medical University, Harbin 150010, China
3. Department of Respiratory Medicine, Southern University of Science & Technology Hospital, Shenzhen 518012, China
4. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China