University of Edinburgh - Asthma UK Centre for Applied Research, Victoria University of Wellington - School of Health, University of Strathclyde - Department of Mathematics & Statistics, University of Edinburgh - Centre for Global Health, University of Edinburgh - Usher Institute of Population Health Sciences and Informatics, University of St. Andrews - School of Medicine, Swansea University - Health Data Research UK, Swansea University - Population Data Science, BREATHE – The Health Data Research Hub for Respiratory Health, Queen’s University Belfast - Public Health Agency, University of Edinburgh - Usher Institute of Population Health Sciences and Informatics, University of Oxford, University of Edinburgh - Centre for Medical Informatics, Swansea University - Health Informatics Group, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Glasgow - MRC/CSO Social and Public Health Sciences Unit, The University of Edinburgh - Royal Infirmary of Edinburgh, University of St Andrews - School of Medicine, Nuffield Department of Primary Care Health Sciences, University of Oxford, Public Health Scotland, Public Health Scotland, Public Health Scotland, University of Strathclyde - Department of Mathematics & Statistics, University of Aberdeen - Academic Primary Care, University of Edinburgh - Usher Institute of Population Health Sciences and Informatics, University of Edinburgh - Usher Institute of Population Health Sciences and Informatics, Swansea University - Population Data Science, University of Oxford - Nuffield Department of Primary Care Health Sciences, Public Health Scotland - Clinical and Public Health Intelligence Team, University of Edinburgh - Usher Institute of Population Health Sciences and Informatics and University of Edinburgh - Asthma UK Centre for Applied Research