1. Mayo Clinic, Phoenix, Arizona
2. Columbia University, New York, New York
3. Cleveland Clinic, Cleveland, Ohio
4. Indiana University, Indianapolis, Indiana
5. University of California-San Diego, San Diego, California
6. Vanderbilt University, Nashville, Tennessee
7. Ohio State University, Columbus, Ohio
8. Massachusetts General Hospital, Boston, Massachusetts
9. Johns Hopkins Hospital, Baltimore, Maryland
10. University of British Columbia, Vancouver, British Columbia, Canada