1 Department of Microbiology and Infection, Royal Sussex County Hospital, Brighton, UK. Electronic address: jrprice@doctors.org.uk.
2 Nuffield Department of Clinical Medicine, Experimental Medicine Division, John Radcliffe Hospital, Oxford, UK; National Institute for Health Research Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford, UK; Public Health England, London, UK.
3 Nuffield Department of Clinical Medicine, Experimental Medicine Division, John Radcliffe Hospital, Oxford, UK; National Institute for Health Research Oxford Biomedical Research Centre, John Radcliffe Hospital, Oxford, UK.
4 Department of Microbiology and Infection, Royal Sussex County Hospital, Brighton, UK; Division of Medicine, Brighton and Sussex Medical School, Falmer, UK.
5 Department of Microbiology and Infection, Royal Sussex County Hospital, Brighton, UK; Public Health England, Royal Sussex County Hospital, Brighton, UK.