1. Toronto General Hospital, University of Toronto Toronto Ontario Canada
2. University of Pennsylvania Philadelphia PA
3. VA Medical Center Dallas TX
4. University of Alberta Edmonton Alberta Canada
5. University of Washington Seattle WA
6. Yale University School of Medicine New Haven CT
7. University of Tennessee Knoxville TN
8. University of California San Francisco CA
9. University of Arizona Tucson AZ
10. Mayo Clinic Arizona Phoenix AZ
11. Emory University Atlanta GA
12. Mercy Medical Center Baltimore MD
13. Mayo Clinic Rochester MN
14. Department of Statistics Commonwealth University of Virginia Richmond VA
15. Commonwealth University of Virginia and McGuire VA Medical Center Richmond VA