1 Centre of Human and Aerospace Physiological Sciences, School of Basic and Medical Biosciences, Faculty of Life Sciences and Medicine, King's College London, King's Health Partners, London, UK caroline.jolley@kcl.ac.uk.
2 Dept of Respiratory Medicine, King's College Hospital NHS Foundation Trust, King's Health Partners, London, UK.
3 Division of Asthma, Allergy and Lung Biology, School of Transplantation, Immunology, Infection and Inflammation Sciences, Faculty of Life Sciences and Medicine, King's College London, King's Health Partners, London, UK.