1. Royal Brompton Hospital; London United Kingdom
2. St. Helier University Hospital; Surrey United Kingdom
3. London Chest Hospital; National Institute for Health Research (NIHR) Cardiovascular Biomedical Research Unit, Barts Health NHS Trust; London United Kingdom
4. Mater Private Hospital; Dublin Ireland
5. Piedmont Heart Institute; Atlanta Georgia
6. Prairie Heart Institute at St. John's Hospital; Springfield Illinois
7. Institute of Cardiology; Warsaw Poland
8. Miami Cardiac & Vascular Institute, Baptist Hospital of Miami; Miami Florida
9. Chesapeake Vascular; PC Crownsville Maryland
10. ROX Medical, Inc.; Brussels Belgium
11. The Ohio State University, Columbus, Ohio; and ROX Medical, Inc.; San Clemente California