University of Oxford - Nuffield Department of Clinical Medicine, University of Oxford - Nuffield Department of Clinical Medicine, University of Oxford - Nuffield Department of Clinical Medicine, University of Oxford - Nuffield Department of Clinical Medicine, University of Oxford - Nuffield Department of Clinical Medicine, University of Oxford - Nuffield Department of Clinical Medicine, University of Oxford - Nuffield Department of Clinical Medicine, Eynsham Medical Group, White Horse Medical Practice, Windrush Medical Practice, University of Oxford - Nuffield Department of Primary Care Health Sciences, University of Oxford - Nuffield Department of Clinical Medicine, University of Oxford - Nuffield Department of Clinical Medicine, University of Oxford - Nuffield Department of Medicine, Imperial College London - National Heart and Lung Institute (NHLI), University of Newcastle (Australia) - Priority Research Centre for Healthy Lungs, Imperial College London - National Heart and Lung Institute (NHLI), University of Nottingham, StatMind, StatMind, Imperial College London - National Heart and Lung Institute (NHLI), University of Oxford - Nuffield Department of Clinical Medicine and University of Oxford - Respiratory Medicine Unit

University of Nottingham, affiliation not provided to SSRN and affiliation not provided to SSRN