1. Stanford University School of Medicine, Palo Alto, California
2. Boston Medical Center, Boston, Massachusetts
3. Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
4. Physician Affiliate Group of New York, New York, New York
5. University of Wisconsin School of Medicine, Madison
6. University of New Mexico School of Medicine, Albuquerque
7. MedStar Health, Columbia, Maryland
8. Christiana Care Health System, Middletown, Delaware
9. Rush University Medical Center, Chicago, Illinois
10. Advocate Christ Medical Center, Oak Lawn, Illinois
11. Brigham and Women's Hospital–Partners HealthCare, Boston, Massachusetts