1. Department of Gastroenterology Cambridge University Hospitals Foundation Trust Cambridge UK
2. Department of Infectious Diseases and Medicine St George's University London UK
3. Institute of Metabolism and Systems Research University of Birmingham Birmingham UK
4. College of Medicine Institute of Life Science Swansea University Swansea UK
5. Department of Medical Gerontology School of Medicine Trinity College Dublin Dublin Ireland
6. The Irish Longitudinal Study on Ageing School of Medicine Trinity College Dublin Dublin Ireland
7. Department of Endocrinology Translational and Clinical Research Institute Newcastle University Faculty of Medical Sciences Newcastle upon Tyne UK
8. Institute of Inflammation and Ageing University of Birmingham College of Medical and Dental Sciences Birmingham UK
9. Molecular Physiology and Cell Signalling Institute of Systems, Molecular and Integrative Biology University of Liverpool Liverpool UK