1. University Hospital Birmingham NHS Foundation Trust, Mindelsohn Road, Edgbaston, Birmingham, UK B15 2GW and Honorary Reader, Institute of Cardiovascular Sciences, University of Birmingham; UK
2. King's College Hospital NHS Foundation Trust, Denmark Hill, London, SE5 9RS UK
3. Echocardiography Laboratory, Hospital da Luz Av. Lus죡, n° 100 - 1500-650, Lisbon, Portugal
4. Department of Cardiology, Bieganski Hospital Medical University of Lodz, Kniaziewicza 1/5, 91-347, Lodz, Poland
5. Department of Cardiology, Baskent University School of Medicine, Fevzi ơkmak Cad. 10. Sok. Bahcelievler 06490 Ankara, Turkey
6. Imperial College London, NHLI Hammersmith Hospital, Du Cane Road, London W12 0NN, UK and University of Athens, Greece
7. University of Medicine and Pharmacy “Carol Davila”–Euroecolab, Institute of Cardiovascular Diseases, Sos. Fundeni 258, sector 2, 022328, Bucharest, Romania
8. 1st Department of Cardiology, General Hospital of Nikea, 3 P. Mela str., 184 54, Athens, Greece
9. Department of Cardiology, CHVZ (Centrum voor Hart en Vaatziekten) Universitair Ziekenhuis, VUB, Laarbeeklaan 101, 1090 Jette, Brussel, Belgium
10. Department of Cardiology, Oslo University Hospital, postboks 4950 Nydalen, 0424 Oslo and Faculty of Medicine, Norwegian University of Science and Technology, NTNU, 7491 Trondheim
11. Department of Cardiology, Oslo University Hospital, Rikshospitalet, Sognsvannsveien 20, NO-0027 Oslo , Norway
12. Department of Medical Sciences, Clinical Physiology, Uppsala University, Akademiska ingang 40, 751 85 Uppsala, Sweden
13. Department of Cardiovascular Sciences, Catholic University of the Sacred Heart, Policlinico Agostino Gemelli, Largo A Gemelli 8, 00168 Roma, Italy
14. Cardiology Section, Onassis Cardiac Surgery Center, Sygrou, 17674, Athens, Greece
15. Departments of Cardiology, University of Lie`ge Hospital, GIGA Cardiovascular Sciences, Heart Valve Clinic, CHU Sart Tilman, Lie‘ge, Belgium and Gruppo Villa Maria Care and Research, Anthea, Hospital, Bari, Italy