1. Gastrointestinal Bacteria Reference Unit, Public Health England, London, UK
2. Antimicrobial Resistance and Healthcare Associated Infections, Public Health England, London, UK
3. Centre for Clinical Microbiology, Division of Infection and Immunity, University of College London, London, UK
4. Department of Medical Microbiology, Royal Free London NHS Foundation Trust, London, UK
5. Department of Microbiology and Infection Control, Technical University of Denmark, Denmark
6. Statistics, Modelling and Economics Department, Public Health England, London, UK
7. Centre for Food and Water Borne Diseases, International Centre for Diarrhoeal Disease Research, Bangladesh
8. Norwich Medical School, University of East Anglia, Norwich, UK