1. School of Biomedical Science and Pharmacy, Faculty Health and Medicine and Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, New Lambton Heights, New South Wales, Australia
2. Asthma UK Centre, Faculty of Life Sciences and Medicine, King’s College London, London, United Kingdom
3. Guy’s Severe Asthma Centre, Guy’s & St. Thomas’ National Health Service Trust, London, United Kingdom
4. National Heart and Lung Institute, Imperial College London, London, United Kingdom
5. Respiratory, Inflammation and Autoimmunity Department, MedImmune, Cambridge, United Kingdom
6. Interdepartmental Study Center for Inflammatory and Smoke-Related Airway Diseases, Cardiorespiratory and Internal Medicine Section, University of Ferrara, Ferrara, Italy
7. Dipartimento di Scienze Biomediche, Pneumologia, Odontoiatriche e delle Immagini Morfologiche e Funzionali, Università degli Studi di Messina, Messina, Italy; and
8. Department of Respiratory and Sleep Medicine, John Hunter Hospital, New Lambton Heights, New South Wales, Australia