Thom W. Rooke, MD, Consultant, Division of Cardiovascular Diseases, and Head, Section of Vascular Medicine, Mayo Clinic; John and Posy Krehbiel Professor of Medicine, Mayo Medical School, College of Medicine; Rochester, Minnesota, USATimothy M. Sullivan, MD, FACS, FACC, Vascular and Endovascular Surgery, North Central Heart Institute, Sioux Falls, South Dakota, USAMichael R. Jaff, DO, Director, Vascular Medicine, Massachusetts General Hospital; Assistant Professor of Medicine, Harvard Medical School; Boston, Massachusetts, USA