1. National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance, Department of Medicine, Imperial College London, Hammersmith Hospital, London, United Kingdom
2. Antimicrobial Resistance and Healthcare Associated Infections Reference Unit, National Infections Service, Public Health England, London, United Kingdom
3. Imperial College Healthcare National Health Service Trust, London, United Kingdom
4. Department of Infectious Disease Epidemiology, School of Public Health, Imperial College London, London, United Kingdom
5. Microbiology, Royal Preston Hospital, Lancashire Teaching Hospitals National Health Service Foundation Trust, Preston, United Kingdom
6. North West London Health Protection Team, Public Health England, London, United Kingdom
7. Public Health Laboratory London, National Infections Service, Public Health England, London, United Kingdom