| Affiliation: | 1. Department of Cardiac Surgery, University of Maryland Baltimore, Baltimore, Md;2. Department of Cardiothoracic Surgery, Robert Wood Johnson University Hospital, New Brunswick, NJ;3. Department of Cardiothoracic Surgery, Lankenau Medical Science Hospital, Wynnewood, Pa;4. Department of Cardiothoracic Surgery, Penn State Hershey Heart and Vascular Institute, Penn State Milton S. Hershey Medical Center, Hershey, Pa;5. Department of Surgery, New York-Presbyterian Hospital/Columbia Milstein Hospital, New York, NY;6. Department of Cardiothoracic Surgery, Tex Heart Institute, St. Luke''s Episcopal Hospital, Houston, Tex |
