National University of Singapore, National University of Singapore, University of Aberdeen - Centre of Academic Primary CareObservational and Pragmatic Research Institute Pte Ltd (OPRI), Duke-NUS Medical School, National University of Singapore, Medical Research Institute of New Zealand, Uppsala University, National University of Singapore (NUS) - Singapore General Hospital, University of Colorado, Aurora, National Jewish Health, King’s College London, Queen's University Belfast, Queen's University Belfast, Queen Mary University of London - Institute of Population Health Sciences, University of Sharjah, Taipei Veterans General Hospital, Hospital Universitari Son Espases, Hospital Universitario Lucus Augusti (HULA), King Fahad Medical City, Médica Sur Clinical Foundation and Hospital - Center of Excellence in Asthma and Allergy, Department of Communication Disorders Sciences, Catholic University of Korea, Kindai University - Kindai University Hospital, Humanitas University, Royal College of Surgeons in Ireland (RCSI), Royal College of Surgeons in Ireland (RCSI), University of Athens - Allergy Department, University of Athens, Bispebjerg and Frederiksberg Hospitals - Department of Respiratory Medicine and Infectious Diseases, Colombian Pulmonology Foundation, Medical University of Sofia, University Hospital “Sv. Ivan Rilski”, Monash University, The University of Sydney - Concord Hospital, University of Newcastle, University of Buenos Aires (UBA), Vancouver Coastal Health Research Institute, Secretary of National Defense, Institute of Security and Social Services for State Workers and National University of Singapore

University of Bergen, University of Verona, University of Bergen, affiliation not provided to SSRN, Aarhus University - Department of Environmental Science, Aarhus University - Department of Environmental Science, Aarhus University - Department of Environmental Science, University of Iceland, Ludwig Maximilian University of Munich (LMU) - Institute and Clinic for Occupational, Social and Environmental Medicine, University of Gothenburg, Uppsala University, Jagiellonian University in Krakow - Institute of Psychology, Umeå University, University of Tartu, Aarhus University, Aarhus University - Danish Ramazzini Centre and University of Bergen

Uppsala University - Respiratory, Allergy and Sleep Research, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, affiliation not provided to SSRN, Uppsala University, Uppsala University, Uppsala University, Uppsala University - Department of Medical Sciences and affiliation not provided to SSRN

Uppsala University, Uppsala University, Uppsala University, Uppsala University, University of Bergen, University of Iceland, University of Gothenburg, Aarhus University, Tartu University Hospital, Umeå University and Uppsala University