1. 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 China
2. Global Health Institute, Nicholas School of the Environment Duke University Durham NC USA
3. Department of Respiratory Medicine Shantou Central Hospital Shantou China
4. Department of Respiratory and Critical Care Medicine Shenzhen People's Hospital Shenzhen China
5. Department of Allergy and Clinical Immunology State Key Laboratory of Respiratory Disease National Clinical Research Center for Respiratory Disease Guangzhou Institute of Respiratory Healththe First Affiliated Hospital of Guangzhou Medical University Guangzhou China