1. Department of Cardiology, Oslo University Hospital, Rikshospitalet, University of Oslo, Sognsvannsveien 20, 0372 Oslo, Norway
2. MedStar Health Research Institute, Georgetown University, Washington, DC, USA
3. Knight Cardiovascular Institute Oregon Health & Science University 3181 SW Sam Jackson Park Rd.- UNH-62 Portland, OR 97239, USA
4. VA Portland Health Care System 3710 SW US Veterans Hospital Rd.-P3CARD Portland, OR 97239, USA
5. Department of Cardiology, Leiden University Medical Centre, 2300RC Leiden, The Netherlands
6. University of California, San Diego, CA, USA
7. Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland Medical Center 22 South Greene Street, Rm N2W78 Baltimore, MD 21201-1595, USA
8. HeartClinic Hirslanden, Zurich, Switzerland
9. Division of Cardiology, Montefiore-Einstein Center for Heart and Vascular Care, 111 East 210th Street, Bronx, NY 10467, USA
10. Department of Cardiology, Amsterdam University Medical Center De Boelelaan 1117 1081HV Amsterdam, The Netherlands
11. Division of Cardiology, Department of Medicine, Northwestern University Feinberg School of Medicine, 303 East Chicago Avenue, Tarry 14-725 Chicago, IL 60611, USA
12. Department of Cardiology, Istituto di Scienze della Vita Scuola Superiore Sant'Anna - Pisa Via G. Moruzzi 1, Pisa, Italy
13. Faculty of Medicine, Department of Cardiology, Clinical Hospital Center Zemun, University of Belgrade, Vukova 9, 11080 Belgrade, Serbia
14. Division of Cardiovascular Ultrasound, Department of Cardiovascular Medicine, Mayo Clinic, 200 First Street SW, Rochester, MN 55905, USA
15. Department of Biomedical Imaging Science, Leeds Institute of Cardiovascular and Metabolic Medicine, University of Leeds, Leeds Teaching Hospitals NHS Trust, Leeds LS2 9JT, UK
16. Cardiologicum Stuttgart and Department of Cardiology, Robert Bosch Krankenhaus, Auerbachstraße 110, 70376 Stuttgart, Germany
17. Alta Bates Summit Medical Center, Berkeley and Oakland, 2450 Ashby Ave, Berkeley, CA 94705, USA
18. CNR, Institute of Clinical Physiology, Via G. Moruzzi 1, 56124 Pisa, Italy
19. Division of Cardiovascular Medicine, University of Virginia Health System, University of Virginia Health Center 1215 Lee Street Charlottesville, VA 22908, USA
20. Knight Cardiovascular Institute, Oregon Health & Science University, 3303 S Bond Ave, Portland, OR 97239, USA
21. Department of Cardiology, University of Medicine and Pharmacy “Carol Davila”—Euroecolab, Emergency Institute for Cardiovascular Diseases “Prof. Dr. C. C. Iliescu”, Sos. Fundeni 258, sector 2, 022328, Bucharest, Romania