1. Department of Cardiology, CIBERCV, University of Alcala, Hospital Ramon y Cajal, Carretera de Colmenar Km 9, 100, 28034 Madrid, Spain
2. Laboratory of Standard and Advanced Echocardiography, Department of Advanced Biomedical Sciences, Federico II University Hospital, Via S. Pansini 5, 80131 Naples, Italy
3. Department of Cardiac, Vascular, and Thoracic Sciences, Padova University Hospital, Via Giustiniani 2, 35128 Padova, Italy
4. Department of Cardiology, St Antonius Hospital, Koekoekslaan 1, 3435 Nieuwegein, Netherlands
5. Department of Medicine, Turku University Hospital, Kiinamyllynkatu 4-8, 20521 Turku, Finland
6. Cardiology Department, King’s College Hospital, Denmark Hill, Brixton, London SE5 9RS, UK
7. Division of Cardiology, Soroka Medical Center and Ben Gurion University of the Negev, Yitzhack I. Rager Blvd 151, 84101 Beersheba, Israel
8. Department of Cardiology, University Medical Centre Ljubljana, Zaloška cesta 7, 1000 Ljubljana, Slovenia
9. Department of Cardiology, Attikon Hospital, Rimini 1, 124 62 Chaidari, Greece
10. Department of Cardiology, University Hospital Zurich, Rämistrasse 100, 8091 Zürich, Switzerland
11. Department of Cardiology, Cardiocentro Ticino, Via Tesserete 48, 6900 Lugano, Switzerland
12. Department of Cardiology, University Hospital of Santiago de Compostela, Rúa Choupana, Santiago de Compostela, 15706 A Coruña, Spain
13. Department of Cardiology, University Hospital of Virgen del Rocio, Av. Manuel Siurot, 41013 Seville, Spain
14. Department of Cardiology, Hospital of Leon, Altos de Navas, 24071 León, Spain
15. Department of Cardiology, University Hospital Reina Sofia, Avenida Menéndez Pidal, 14004 Córdoba, Spain
16. Department of Cardiology, University Hospital Vall d’Hebron, Passeig de la Vall d’Hebron, 119-129, 08035 Barcelona, Spain
17. Cardiology Department, Thorax Institute, Hospital Clinic Barcelona, Carrer de Villarroel, 170, 08036 Barcelona, Spain
18. Department of Cardiology, University Hospital Virgen Victoria, Campus de Teatinos, 29010 Málaga, Spain
19. Cardiology Division, Department of Medicine, Hospital de la Santa Creu i Sant Pau, Carrer de Sant Quintí, 89, 08041 Barcelona, Spain
20. Department of Cardiology, University Francisco de Vitoria, Hospital La Zarzuela, Calle de Pleyades, 25, 28023 Madrid, Spain