1. Department of Surgery, Yale School of Medicine, New Haven, Connecticut
2. Department of Surgery, University of Arizona College of Medicine, Tucson
3. Division of Urology, University of Toronto, Toronto, Ontario, Canada
4. Department of Surgery, Tulane University School of Medicine, New Orleans, Louisiana
5. Department of Cardiothoracic Surgery, Stanford University Hospital, Stanford, California
6. Department of Surgery, Beth Israel Deaconess Medical Center, Boston, Massachusetts
7. Department of Surgery, University of North Carolina at Chapel Hill School of Medicine, Chapel Hill
8. Department of Surgery, University of Iowa, Iowa City
9. Department of Surgery, University of Texas Southwestern Medical School, Dallas
10. Department of Surgery, University Hospitals Cleveland Medical Center, Cleveland, Ohio
11. Department of Surgery, University of Cincinnati College of Medicine, Cincinnati, Ohio