1. University of Arkansas for Medical Science, Little Rock, USA
2. Reach Institute, New York, NY, USA
3. University of North Carolina, Chapel Hill, USA
4. Duke University, Durham, NC, USA
5. University of California, Los Angeles, USA
6. University of California, Berkeley, USA
7. University of Pittsburgh, PA, USA
8. University of California, Irvine, USA
9. Ohio State University, Columbus, USA
10. McGill University, Montreal, Quebec, Canada