1. Department of Gastroenterology, Nottingham University Hospitals NHS Trust, Nottingham NG7 2UH, UK
2. School of Medicine, University of Nottingham, Nottingham NG7 2RD, UK
3. Healthcare Associated Infection Research Group, Leeds Institute of Medical Research, University of Leeds, Leeds LS9 7TF, UK
4. Department of Microbiology, Leeds Teaching Hospitals, Leeds LS1 3EX, UK
5. Infection and Prevention Control, Nottingham University Hospitals NHS Trust, Nottingham NG7 2UH, UK
6. Department of Microbiology, Nottingham University Hospitals NHS Trust, Nottingham NG7 2UH, UK
7. NIHR Nottingham Biomedical Research Centre, School of Medicine, University of Nottingham, Nottingham NG7 2UH, UK
8. Nottingham Digestive Diseases Centre, University of Nottingham, Nottingham NG7 2UH, UK
9. Translational Medical Sciences, School of Medicine, University of Nottingham, Nottingham NG7 2UH, UK