1. San Raffaele Scientific Institute; Milan Italy
2. University of Arkansas for Medical Sciences; Little Rock Arkansas
3. VA North Texas Health Care System, and University of Texas Southwestern Medical Center; Dallas Texas
4. Department of Cardiology; Belfast Health and Social Care Trust; Belfast United Kingdom
5. Forth Valley Royal Hospital; Forth Valley United Kingdom
6. Mid America Heart Institute; Kansas City Missouri
7. Quebec Heart and Lung Institute, Laval University; Quebec City Canada
8. Boston Scientific Corp; Minneapolis Minnesota
9. PeaceHealth Medical Center; St. Joseph Hospital; Bellingham Washington
10. Department of Medical Sciences and Pediatrics; Clinical Division of Cardiology, Cannizzaro Hospital, University of Catania; Italy
11. Department of Cardiology; AHEPA University Hospital; Thessaloniki Greece
12. Ospedale San Giovanni Bosco; Torino Italy
13. Presbyterian Hospital/Columbia University Medical Center; New York
14. Piedmont Hospital; Atlanta Georgia
15. EMO-GVM Centro Cuore Columbus; Milan Italy