1. Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA
2. Georgetown University Hospital, Washington, DC
3. Vanderbilt University Medical Center, Nashville, TN
4. Hospital of the University of Pennsylvania, Philadelphia, PA
5. Virginia Commonwealth University Medical Center, Richmond, VA
6. University of Michigan, Ann Arbor, MI
7. Scientific Registry of Transplant Recipients, University Renal Research and Education Association, Ann Arbor, MI