1 Division of Cardiothoracic Surgery, Brooke Army Medical Center, 3551 Roger Brooke Dr, Ft Sam Houston JBSA, TX 78234. Electronic address: donnell.k.bowen.mil@mail.mil.
2 Division of Cardiothoracic Surgery, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania.
3 Division of Thoracic Surgery, Chesapeake Regional Medical Center, Chesapeake, Virginia.
4 Division of Thoracic Surgery, University of California-Davis Health System, Sacramento, California.
5 Department of Cardiothoracic Surgery, St. John's Regional Medical Center, Oxnard, California.