1. NHS Lothian Infection Service, Royal Infirmary of Edinburgh, Edinburgh, UK
2. School of Medicine, University of St Andrews, St Andrews, UK
3. Medical Microbiology, Aberdeen Royal Infirmary, Aberdeen, UK
4. Present address: Medical Microbiology, Ninewells Hospital, Dundee, UK
5. Present address: School of Social and Behavioural Sciences, Erasmus University, Rotterdam, Netherlands
6. Present address: Department of Medicine III, University Hospital, LMU Munich, Germany
7. Medical Microbiology, Forth Valley Royal Hospital, Larbert, UK
8. Antimicrobial Resistance and Healthcare Associated Infections (AMRHAI) Reference Unit, National Infection Service, Public Health England, London, UK