1. Harrington Heart and Vascular Institute, University Hospitals Case Medical Center; Case Western Reserve University; Cleveland Ohio
2. Division of Cardiology, VCU Pauley Heart Center, Medical College of Virginia Campus; Virginia Commonwealth University; Richmond Virginia
3. The Els and Charles Bendheim Department of Cardiology; Shaare Zedek Medical Center; Jerusalem Israel
4. Center for Interventional Vascular Therapy, New York Presbyterian Hospital; Columbia University Medical Center; New York City New York