1. INTEGRIS Heart Hospital; Oklahoma City OK
2. West Virginia University School of Medicine; Charleston WV
3. Minneapolis Heart Institute at Abbott Northwestern Hospital; Minneapolis MN
4. Pinnacle Health Cardiovascular Institute; Harrisburg PA
5. Beth Israel Deaconess Medical Center; Boston MA
6. Abbott Vascular; Santa Clara CA
7. VasCore; The Vascular Ultrasound Core Laboratory; Massachusetts General Hospital; Boston MA