1. Healthcare-Associated Infection Research Group, University of Leeds, Leeds, UK
2. Clinical Microbiology Department, Leeds Teaching Hospitals NHS Trust, Leeds, UK
3. Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
4. NIHR Health Protection Unit in Healthcare Associated Infections and Antimicrobial Resistance at University of Oxford in partnership with Public Health England, Oxford, UK
5. Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, National Infection Service, Public Health England, London, UK
6. Department of Hepatobiliary Surgery, Leeds Teaching Hospitals NHS Trust, Leeds, UK