1. Newcastle NIHR Biomedical Research Centre Newcastle upon Tyne Hospitals NHS Foundation Trust Newcastle upon Tyne UK
2. Department of Gastroenterology Newcastle upon Tyne Hospitals NHS Foundation Trust Newcastle upon Tyne UK
3. Population Health Sciences Institute, Faculty of Medical Sciences Newcastle University Newcastle upon Tyne UK
4. Human Nutrition Research Centre, Population Health Sciences Institute, Faculty of Medical Sciences Newcastle University Newcastle upon Tyne UK