1. Keele Cardiovascular Research Group, Centre for Prognosis Research, Institute for Primary Care and Health Sciences, Keele University, Keele Road, Stoke-on-Trent, UK
2. Department of Cardiology, MD Anderson Cancer Center, University of Texas, Houston, TX, USA
3. Division of Cardiology, Providence St. Peter Hospital, Olympia, WA, USA
4. Department of Cardiology, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
5. Department of Cardiology, Queen Elizabeth Hospital Birmingham, Birmingham, UK
6. Department of Cardiology, James Cook University Hospital, Middlesborough, UK
7. Academic Department of Cardiology, Royal Stoke Hospital, Stoke-on-Trent, UK
8. Department of Medicine (Cardiology), Thomas Jefferson University Hospital, Philadelphia, PA, USA