| Affiliation: | 1. Division of Thoracic Surgery, Department of Cardiothoracic Surgery, Stanford University, School of Medicine, Stanford, Calif;2. Division of Thoracic Surgery, Department of Surgery, David Geffen School of Medicine at UCLA and West Los Angeles VA Medical Center, Los Angeles, Calif;3. Division of Cardiothoracic Surgery, Department of Surgery, University of Washington Medical Center, Seattle, Wash;4. Department of Biostatistics & Bioinformatics, Duke University School of Medicine, Durham, NC;5. Department of Cardiothoracic Surgery, Oregon Heath and Science University, Portland, Ore;6. Section of Cardiac and Thoracic Surgery, Department of Surgery, University of Chicago, Medicine and Biological Sciences, Chicago, Ill |
