1. Harrington Heart and Vascular Institute University Hospitals Cleveland Medical Center Cleveland Ohio USA
2. Departments of Internal Medicine and Surgery Yale University School of Medicine New Haven Connecticut USA
3. Department of Cardiothoracic Surgery Methodist DeBakey Heart and Vascular Center, Houston Methodist Houston Texas USA
4. Department of Cardiovascular Surgery University of Pennsylvania School of Medicine Philadelphia Pennsylvania USA
5. Structural Heart and Aortic Statistics Department Medtronic Mounds View Minnesota USA