1 Department of Cardiothoracic Surgery, The University of Texas Health Science Center at San Antonio, San Antonio, Tex. Electronic address: huids@uthscsa.edu.
2 Division of Cardiovascular and Thoracic Surgery, Duke University Medical Center, Durham, NC.
3 Division of Cardiovascular and Thoracic Surgery, Department of Surgery, The University of Texas Medical Branch-Galveston, Galveston, Tex.
4 Department of Cardiothoracic Surgery, Weill Cornell Medicine, New York, NY.
5 Division of Cardiovascular and Thoracic Surgery, The University of Texas at Austin/Dell Medical School, Austin, Tex.
6 Department of Cardiothoracic Surgery, Stanford University, Stanford, Calif.
7 Division of Cardiothoracic Surgery, Department of Surgery, University of California San Francisco Medical Center and San Francisco VA Medical Center, San Francisco, Calif.
8 Division of Cardiothoracic Surgery, Department of Surgery, University of Virginia, Charlottesville, Va.