1 Department of Respiratory Sciences, University of Leicester, Leicester, UK; Department of Infection and HIV Medicine, University Hospitals of Leicester NHS Trust, Leicester, UK.
2 The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia.
3 Department of Infection and HIV Medicine, University Hospitals of Leicester NHS Trust, Leicester, UK.
4 School of Clinical and Experimental Sciences, University of Southampton, Southampton, UK.
5 Lifespan and Population Health, School of Medicine, University of Nottingham, Nottingham, UK.
6 Department of Respiratory Sciences, University of Leicester, Leicester, UK; Department of Clinical Microbiology, University Hospitals of Leicester NHS Trust, Leicester, UK.
7 Department of Respiratory Sciences, University of Leicester, Leicester, UK; Department of Infection and HIV Medicine, University Hospitals of Leicester NHS Trust, Leicester, UK. Electronic address: mp426@le.ac.uk.