1 Academic Unit of Clinical and Experimental Sciences, University of Southampton Faculty of Medicine, University Hospital Southampton, Southampton, UK Southampton NIHR Respiratory Biomedical Research Unit, University Hospital Southampton, Southampton, UK.
2 Dept of Radiology, Kings College Hospital Foundation Trust, London, UK.
3 Dept of Pathology, University of California San Francisco, San Francisco, CA, USA.
4 Academic Unit of Clinical and Experimental Sciences, University of Southampton Faculty of Medicine, University Hospital Southampton, Southampton, UK Southampton NIHR Respiratory Biomedical Research Unit, University Hospital Southampton, Southampton, UK [email protected].