1. University of Pennsylvania
2. Abigail Wexner Research Institute Nationwide Children’s Hospital
3. Ann & Robert H. Lurie Children’s Hospital of Chicago
4. New York University Grossman School of Medicine
5. Vanderbilt University Medical Center
6. University of Colorado School of Medicine and Children's Hospital
7. University of Michigan
8. Columbia University Mailman School of Public Health
9. Children’s Hospital of Philadelphia