1. Piedmont Heart Institute, Atlanta, GA (D.E.K.).
2. Leicester Biomedical Research Centre, University Hospitals of Leicester, University of Leicester, United Kingdom (A.H.G.).
3. Imperial College of Science, Technology and Medicine, London, United Kingdom (P.W.S.).
4. Center for Interventional Vascular Therapy, Division of Cardiology, New York-Presbyterian Hospital/Columbia University Medical Center (M.B.L., N.J.L., G.W.S.).
5. Clinical Trials Center, Cardiovascular Research Foundation, New York, NY (M.B.L., N.J.L., P.G., O.D., G.W.S.).
6. Ramsay Générale de Santé, Hôpital Privé Jacques Cartier, Massy, France (M.-C.M.).
7. Abbott Vascular, Inc, Santa Clara, CA (C.A.S.).
8. John Radcliffe Hospital, Oxford, United Kingdom (A.P.B.).
9. Heart and Vascular Center, Semmelweis University, Budapest, Hungary (B.M.).
10. Medisch Centrum Leeuwarden, The Netherlands (A.J.v.B.).
11. Cardiology Center, University of Szeged, Hungary (I.U.).
12. Thoraxcenter, Erasmus MC, Rotterdam, The Netherlands (A.P.K.).
13. Department of Surgery, UH Cleveland Medical Center, OH (J.F.S.).
14. Gagnon Cardiovascular Institute, Morristown Medical Center, NJ (P.G.).
15. Hôpital du Sacré-Coeur de Montréal, Québec, Canada (P.G.).