1. From the Section of Vascular and Endovascular Surgery, Department of Surgery, Ochsner Clinic, New Orleans, LA (H.A.B., A.J.B.); The University of Queensland School of Medicine, Ochsner Clinical School, New Orleans, LA (H.A.B., A.J.B.); and Department of Physiology and the Heart & Vascular Institute, Tulane School of Medicine, New Orleans, LA (S.A.H., A.B., A.J.B., D.L., T.C.W.).