1. Department of Allergy and Clinical Immunology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea.
2. Department of Internal Medicine, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea.
3. Centre for Respiratory Medicine and Allergy, Institute of Inflammation and Repair, University of Manchester and University Hospital of South Manchester, Manchester Academic Health Science Centre, Manchester, UK.
4. Respiratory Research Unit, University of Nottingham, Nottingham, UK.
5. National Heart and Lung Institute, Imperial College London, and Biomedical Research Unit, Royal Brompton and Harefield NHS Trust, London, UK.
6. Respiratory Therapeutic Unit, GlaxoSmithKlene, Stockley Park, UK.
7. NIHR Southampton Respiratory Biomedical Research Unit, Clinical and Experimental Sciences and Human Development and Health, Southampton, UK.
8. Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden.
9. Amsterdam University Medical Centres, University of Amsterdam, Amsterdam, The Netherlands.
10. Divisions of Pulmonary, Critical Care, and Sleep Medicine, and Allergy/Immunology; and Institute for Translational Sciences, University of Texas Medical Branch, Galveston, TX, USA.
11. Department of Medicine, Harvard Medical School, Boston, MA, USA.
12. Department of Medicine, University of Kansas School of Medicine, Kansas City, KS, USA.
13. Department of Public Health Sciences, Pennsylvania State University College of Medicine, Hershey, PA, USA.
14. University of Arizona Arizona Health Sciences Center, Tucson, AZ, USA.
15. Wake Forest School of Medicine, Winston-Salem, NC, USA.
16. UW Allergy, Pulmonary and Critical Care Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.
17. Department of Internal Medicine, Division of Allergy and Clinical Immunology, Seoul National University Bundang Hospital, Seongnam, Korea.
18. Department of Internal Medicine, Soonchunhyang University Bucheon Hospital, Soonchunhyang University School of Medicine, Bucheon, Korea.
19. Department of Internal Medicine, Ulsan University Hospital, Ulsan University School of Medicine, Ulsan, Korea.
20. Department of Internal Medicine, Ewha Womans University College of Medicine, Seoul, Korea.
21. Department of Allergy and Clinical Immunology, Ajou University School of Medicine, Suwon, Korea.
22. Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.
23. Department of Public Health Science, Seoul National University, Seoul, Korea.
24. ProAR Foundation and Federal University of Bahia, Salvador, Brazil.
25. Department of Environmental Medicine and Occupational Health, Graduate School of Public Health, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA.