1. University of Pennsylvania; Philadelphia
2. Columbia University; New York New York
3. University of California; San Francisco
4. University of Nebraska; Omaha
5. University of Philadelphia; Philadelphia Pennsylvania
6. Philadelphia VA Medical Center and University of Pennsylvania; Philadelphia
7. Salt Lake City VA Medical Center and University of Utah; Salt Lake City
8. Denver VA Medical Center and University of Colorado School of Medicine; Denver
9. University of Utah; Salt Lake City