1 Heart Vascular and Thoracic Institute, Department of Cardiovascular Medicine, Section of Vascular Medicine, Cleveland Clinic Foundation, Ohio.
2 Department of Surgery, Division of Vascular Surgery, University of Rochester School of Medicine, NY.
3 The Glickman Urological & Kidney Institute, Department of Urology.
4 Heart Vascular and Thoracic Institute, Department of Cardiovascular Medicine, Section of Vascular Medicine, Cleveland Clinic Foundation, Ohio; Taussig Institute, Department of Hematology, Cleveland Clinic Foundation, Ohio; Department of Cardiovascular and Metabolic Sciences, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio. Electronic address: scameron_2@yahoo.com.