1. The James Cook University Hospital; Middlesbrough United Kingdom
2. Keele Cardiovascular Research Group, Keele University; Stoke-on-Trent United Kingdom
3. Royal Stoke University Hospital; Stoke-On-Trent United Kingdom
4. Institute of Population Health University of Manchester; Manchester United Kingdom
5. Queen Elizabeth Hospital; Birmingham United Kingdom
6. Department of Cardiology; Freeman Hospital and Institute of Cellular Medicine, Newcastle University; Newcastle Upon Tyne United Kingdom