1 Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; Center for Thoracic Aortic Disease, Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa.
2 Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; Center for Thoracic Aortic Disease, Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa. Electronic address: [email protected].