1. State Key Laboratory of Respiratory Diseases, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University
2. Guangdong Provincial Key Laboratory of Allergy & Clinical Immunology, State Key Laboratory of Respiratory Disease, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 510180, China
3. Department of Respiratory Medicine, Minzu Hospital of Guangxi Zhuang Autonomous Region, Guangxi Medical University, Nanning 530001, China
4. State Key Laboratory of Respiratory Diseases, Department of Allergy and Clinical Immunology, Guangzhou Institute of Respiratory Health, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 510180, China
5. Department of Respiratory Medicine, Zhujiang Hospital, Southern Medical University, Guangzhou 510280, China
6. Division of Respirology, Department of Medicine, McMaster University, Firestone Institute for Respiratory Health (FIRH), The Research Institution of St. Joe's Hamilton (RISH), St. Joseph's Healthcare, Hamilton, ON L8N 4A6, Canada