1 Division of Thoracic and Cardiovascular Surgery, Department of Surgery, Congenital Heart Center, University of Florida, Gainesville, Fla. Electronic address: JeffJacobs@msn.com.
2 Department of Surgery, University of Pennsylvania, Philadelphia, Pa; Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Md.
3 Department of Cardiothoracic Surgery, Heart Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.
4 Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, Md.