1. Seattle Children's Hospital; University of Washington; Seattle
2. University of North Carolina; Chapel Hill
3. Stanford Children's Health; Stanford University; Palo Alto California
4. Children's Mercy; Kansas City Missouri
5. Levine Children's Hospital; Charlotte North Carolina
6. Schneider Children's Medical Center of Israel, Petach Tikva Israel, and Sackler Faculty of Medicine, Tel Aviv University; Tel Aviv Israel
7. University of Utah; Salt Lake City
8. Duke Children's Hospital; Durham North Carolina
9. Joseph M. Sanzari Children's Hospital; Hackensack University Medical Center; Hackensack New Jersey
10. Children's Healthcare of Atlanta; Emory University; Atlanta Georgia
11. Hospital for Special Surgery; New York New York
12. Stony Brook Children's Hospital; Stony Brook New York
13. Boston Children's Hospital and Beth Israel Deaconess Medical Center; Boston Massachusetts
14. University of Calgary; Calgary Alberta Canada
15. McMaster Children's Hospital; Hamilton Ontario Canada
16. National Institute of Allergy and Infectious Diseases; National Institutes of Health; Bethesda Maryland
17. University of Vermont Medical Center; Burlington
18. Goryeb Children's Hospital; Morristown New Jersey
19. Hacettepe University; Ankara Turkey
20. Vivantes Children's Hospital in Friedrichshain; Berlin Germany
21. The Hospital for Sick Children and University of Toronto; Toronto Ontario Canada
22. Boston Children's Hospital; Boston Massachusetts
23. Children's Hospital Dresden, University Medical Center Carl Gustav Carus, TU Dresden, Dresden, Germany, and Institute of Translational Medicine, University of Liverpool, and Alder Hey Children's NHS Foundation Trust Hospital; Liverpool UK
24. University of Iowa Carver College of Medicine; Iowa City