1. Research Department, Keele Cardiovascular Research Group, Centre for Prognosis Research Keele University Stoke‐on‐Trent North Midlands UK
2. Department of Cardiology Royal Stoke University Hospital Stoke‐on‐Trent North Midlands UK
3. Department of Cardiology University Hospital of Wales Cardiff Cardiff UK
4. Department of Cardiology Queen Elizabeth Hospital Birmingham West Midlands UK