1 Heart Center at Missouri Baptist Medical Center, St Louis, Missouri.
2 Loyola University Medical Center, Chicago, Illinois.
3 Department of Cardiovascular and Thoracic Surgery, West Virginia University, 1 Medical Center Dr, Morgantown, WV 26506. Electronic address: [email protected].
4 Department of Cardiovascular and Thoracic Surgery, West Virginia University, Morgantown, West Virginia.