1 Department of Respiratory Sciences, University of Leicester, Leicester LE1 7RH, UK; Department of Infectious Diseases and HIV Medicine, Leicester Royal Infirmary, University Hospitals of Leicester NHS Trust, Leicester, UK.
2 Department of Cardiovascular Sciences, University of Leicester, Leicester LE1 7RH, UK.
3 Department of Clinical Education, Leicester Royal Infirmary, University Hospitals of Leicester NHS Trust, Leicester, UK.
4 Department of Respiratory Sciences, University of Leicester, Leicester LE1 7RH, UK.
5 Department of Respiratory Sciences, University of Leicester, Leicester LE1 7RH, UK; Department of Virology, Leicester Royal Infirmary, University Hospitals of Leicester NHS Trust, Leicester, UK.
6 Department of Respiratory Sciences, University of Leicester, Leicester LE1 7RH, UK; Department of Infectious Diseases and HIV Medicine, Leicester Royal Infirmary, University Hospitals of Leicester NHS Trust, Leicester, UK. Electronic address: [email protected].