Tulane School of Medicine/Children's Hospital New Orleans, New Orleans, Louisiana, USA;5. Perelman School of Medicine at the University of Pennsylvania/Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA

Keck School of Medicine of University of Southern California/Children's Hospital Los Angeles, Los Angeles, California, USA;6. University of Florida College of Medicine-Jacksonville/Nemours Children's Specialty Care, Jacksonville, Florida, USA;7. Oregon Health & Science University, Doernbecher Children's Hospital, Portland, Oregon, USA;8. Vanderbilt University School of Medicine/Monroe Carell Jr Children's Hospital, Vanderbilt University Medical Center, Nashville, Tennessee, USA;9. Cook Children's Medical Center, Fort Worth, Texas, USA;10. University of Arkansas for Medical Sciences/Arkansas Children's Hospital, Little Rock, Arkansas, USA;11. University of Colorado School of Medicine/Children's Hospital Colorado, Aurora, Colorado, USA;12. Indiana University School of Medicine/Riley Children's Hospital, Indianapolis, Indiana, USA;13. Ohio State University College of Medicine/Nationwide Children's Hospital, Columbus, Ohio, USA;14. Wake Forest University School of Medicine/Atrium Health Wake Forest Baptist, Winston-Salem, North Carolina, USA;15. Duke University School of Medicine, Duke Children's Hospital, Durham, North Carolina, USA;16. Providence Sacred Heart Medical Center and Children's Hospital, Spokane, Washington, USA;17. Case Western Reserve University/Rainbow Babies and Children's Hospital, Cleveland, Ohio, USA;18. Byram Hills High School, Armonk, New York, USA;19. Stanford University School of Medicine/Lucile Packard Children's Hospital, Palo Alto, California, USA