1. The National Institute for Health Research Health Protection Research Unit in Healthcare Associated Infections and Antimicrobial Resistance at the University of Oxford, Oxford, United Kingdom
2. Health Economics Research Centre, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom
3. Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom
4. Oxford University Hospitals National Health Service Trust, Oxford, United Kingdom
5. Nuffield Department of Clinical Medicine, University of Oxford, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
6. National Institute for Health Research Oxford Biomedical Research Centre, John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
7. Health Services Research Unit, Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom