1 Clinical Decisions Unit, University Hospitals of Leicester NHS Trust, Leicester, UK.
2 Infection and HIV Medicine, University Hospitals of Leicester NHS Trust, Leicester, UK; Respiratory Sciences, University of Leicester, Leicester, UK.
3 Cardiovascular Sciences, University of Leicester, Leicester, UK.
4 Clinical Decisions Unit, University Hospitals of Leicester NHS Trust, Leicester, UK; Respiratory Sciences, University of Leicester, Leicester, UK.
5 Respiratory Sciences, University of Leicester, Leicester, UK; Clinical Microbiology, Leicester Royal Infirmary, Infirmary Square University Hospitals of Leicester NHS Trust, Leicester LE1 5WW, UK. Electronic address: Julian.tang@uhl-tr.nhs.uk.