1 Division of Integrative Systems Medicine and Digestive Disease, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, London, UK; Departments of Gastroenterology and Hepatology, St Mary's Hospital, Imperial College Healthcare NHS Trust, Paddington, London, UK.
2 Department of Gastroenterology, Queen Elizabeth Hospital Birmingham, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK.
3 Division of Integrative Systems Medicine and Digestive Disease, Department of Surgery and Cancer, Faculty of Medicine, Imperial College London, London, UK; Inflammatory Bowel Disease Unit, St Mark's Hospital, Harrow, London, UK.
4 Centre for Clinical Infection and Diagnostics Research, King's College London, London, UK; Department of Microbiology, Guy's and St Thomas' NHS Foundation Trust, London UK. Electronic address: [email protected].