1. Keele Cardiovascular Research Group, Keele University Stoke‐on‐Trent UK
2. Department of CardiologyRoyal Stoke University Hospital Stoke‐on‐Trent UK
3. Department of CardiologyUniversity College London Hospitals and St. Bartholomew's Hospital London UK
4. Department of Gastroenterology and Institute of Applied Clinical SciencesRoyal Stoke University Hospital Stoke‐on‐Trent UK
5. Faculty of BiologyMedicine and Health, University of Manchester Manchester UK
6. Department of CardiologyQueen Elizabeth Hospital Birmingham UK
7. Department of CardiologyThe James Cook University Hospital Middlesbrough UK
8. Department of CardiologyFreeman Hospital and Institute of Cellular Medicine, Newcastle University Newcastle Upon Tyne UK
9. Department of CardiologyUniversity Hospital of Wales Cardiff UK