1. Hospital Cliinico San Carlos IDISSC and Universidad Complutense de Madrid, Madrid, Spain; Calle Profesor Martín Lagos s/n, 28040 Madrid, Spain
2. Department of Cardiology, Academic Medical Center of Amsterdam, Cardiology, Amsterdam, the Netherlands; Meibergdreef 9, 1105 AZ Amsterdam-Zuidoost, the Netherlands
3. Department of Cardiology, John Radcliffe Hospital, Cardiology, Oxford, UK; Headley Way, Headington, Oxford OX3 9DU, UK
4. Department of Cardiology Belfast Health & Social Care Trust, Belfast, UK; Knockbracken Healthcare Park, Saintfield Rd, Belfast BT8 8BH, UK
5. Hospital Clinic I Provincial de Barcelona, Barcelona, Spain; Carrer de Villarroel, 170, 08036 Barcelona, Spain
6. Department of Cardiology, Imperial College London, London, UK; Kensington, London SW7 2AZ, UK
7. 1st Department of Cardiology, University of Medical Sciences, Poznań, Poland; Collegium Maius, Fredry 10, 61-701 Poznań, Poland
8. Department of Cardiology, Hospital Universitario la Paz, Madrid, Spain; Paseo de la Castellana, 261, 28046 Madrid, Spain
9. Department of Cardiology, Hospital Universitario de Salamanca, IBSAL, Salamanca, Spain; Paseo de San Vicente, 58, 37007 Salamanca, Spain
10. Department of Cardiology, Papworth Hospital NHS Foundation Trust, Cambridge, UK; Papworth Everard, Cambridge CB23 3RE, UK
11. Department of Cardiology, Freeman Hospital and Newcastle University, Newcastle-upon-Tyne, UK; High Heaton, Newcastle upon Tyne NE7 7DN, UK
12. Manchester Heart Centre, Manchester Royal Infirmary, Central Manchester University Hospitals, Manchester, UK; Oxford Rd, Manchester M13 9WL, UK
13. Liverpool Heart and Chest Hospital, Liverpool, UK; Thomas Dr, Liverpool L14 3PE, UK
14. Thoraxcenter, Erasmus MC, the Netherlands; ’s-Gravendijkwal 230, 3015 CE Rotterdam, the Netherlands
15. The Royal Infirmary of Edinburgh, Edinburgh, UK; 51 Little France Dr, Edinburgh EH16 4SA, UK
16. Department of Cardiology, Hospital Universitario Valdecilla, Cantabria, Spain; Av. Valdecilla, 25, 39008 Santander, Cantabria, Spain
17. American Heart of Poland (PAK), Ustrón, Poland; Sanatoryjna 1, 43-450 Ustrón, Poland
18. Department of Cardiology, Hospital Meixoeiro, Pontevedra, Spain; Camiño Meixoeiro, s/n, 36214 Vigo, Pontevedra, Spain
19. Brighton & Sussex University Hospitals NHS Trust, Brighton, UK; Barry Building, Eastern Rd, Brighton BN2 5BE, UK
20. Gornoslaskie Centrum Medycnze, Poland; 45/47, 40-635 Katowice, Poland
21. Department of Interventional Cardiology, Jagiellonian University, Krakow, Poland; Gołȩbia 24, 31-007 Kraków, Poland
22. Cardialysis BV, Rotterdam, the Netherlands; Westblaak 98, 3012 KM, Rotterdam, the Netherlands
23. European Cardiovascular Research Institute, Westblaak 98, 3012 KM, Rotterdam, the Netherlands