1 Department of Medicine, University of Cambridge, Cambridge, United Kingdom; Clinical Microbiology and Public Health Laboratory, Public Health England, Cambridge, United Kingdom.
2 Pharmacy Department, Cambridge University Hospitals NHS Foundation Trust, Cambridge, United Kingdom.
3 Clinical Microbiology and Public Health Laboratory, Public Health England, Cambridge, United Kingdom.
4 Clinical Microbiology and Public Health Laboratory, Public Health England, Cambridge, United Kingdom. Electronic address: [email protected].