1. University of Louisville, Louisville, Kentucky, United States
2. University of Mississippi Medical Center, Jackson, Mississippi, United States
3. University of Adelaide, Adelaide, South Australia, Australia
4. University of Alberta, Edmonton, Alberta, Canada
5. University of California Los Angeles, Los Angeles, California, United States
6. University of Cambridge, Cambridge, United Kingdom
7. Maastricht University, Maastricht, The Netherlands
8. University of Colorado School of Medicine, Aurora, Colorado, United States
9. University of South Carolina School of Medicine, Columbia, South Carolina, United States
10. West Virginia University School of Medicine, Morgantown, West Virginia, United States
11. University of Texas Health San Antonio, San Antonio, Texas, United States
12. Loma Linda University School of Medicine, Loma Linda, California, United States