1. Division of Cardiology University of Missouri Columbia Missouri USA
2. Saint Luke's Mid America Heart Institute Kansas City Missouri USA
3. Divison of Cardiology University of Missouri Kansas City Kansas City Missouri USA
4. Piedmont Heart Institute Atlanta Georgia USA
5. Columbia University Irving Medical Center/NewYork‐Presbyterian Hospital and the Cardiovascular Research Foundation New York New York USA
6. Beth Israel Deaconess Medical Center Boston Massachusetts USA
7. Divsion of Cardiology University of Washington Seattle Washington USA
8. Division of Cardiology Washington University St. Louis Missouri USA
9. Morristown Medical Center Morristown New Jersey USA