1. The Cardiac & Vascular Research Center of Northern Michigan Petoskey Michigan
2. Tufts Medical Center Boston Massachusetts
3. NEA Baptist Memorial Hospital Jonesboro Arkansas
4. St. Bernards Medical Center Jonesboro Arkansas
5. Aspirus Heart and Vascular Institute ‐ Research and Education Wausau Wisconsin
6. Centennial Heart and Vascular Nashville Tennessee
7. Boston Scientific Corporation Marlborough Massachusetts