University of Arizona - Asthma and Airway Diseases Research Center, University of Leicester - Institute for Lung Health, University of Arizona - Asthma and Airway Diseases Research Center, University of Arizona - Asthma and Airway Diseases Research Center, University of Groningen - Groningen Research Institute for Asthma and COPD, University of Ferrara - Section of Respiratory Medicine, University of Groningen - Groningen Research Institute for Asthma and COPD, Chiesi Farmaceutici SpA - Department of Global Clinical Development, University of Ferrara - Respiratory Medicine, Christian Albrechts University Kiel - LungenClinic, The University of Manchester - Centre for Respiratory Medicine and Allergy, University of Leicester - Institute for Lung Health, University of Leicester - Institute for Lung Health and Independent