1. University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania
2. University of Münster, Münster
3. Leiden University, Medical Center, Leiden
4. Stanford University, School of Medicine, California
5. Harvard University, School of Medicine, Boston, Massachusetts
6. Dartmouth College, School of Medicine, Hanover, New Hampshire
7. University of Washington, School of Medicine, Seattle, Washington
8. Icahn School of Medicine at Mount Sinai, New York
9. Columbia University, School of Medicine, New York