1. Cardiovascular Clinic Institute, Hospital Clinic; University of Barcelona, IDIBAPS; Barcelona Spain
2. Ferrarotto Hospital, University of Catania; Catania Italy
3. Medizinische Klinik und Poliklinik; Universitätsmedizin Mainz, University Medical Center; Mainz Germany
4. Department of Cardiology; University of Giessen; Giessen Germany
5. EMOGVM Centro Cuore and San Raffaele Hospitals; Milan Italy
6. San Giovanni di Dio Hospital; Agrigento Italy
7. Royal Brompton Hospital & Imperial College; London United Kingdom
8. Klinik für Kardiologie und Angiologie, Elisabeth-Krankenhaus; Essen Germany
9. Department of Cardiology; University of Medical Sciences; Poznan Poland
10. Department of Cardiology, Klinikum Großhadern; Ludwig-Maximilian Universität; Munich Germany