1. CDC COVID-19 Response Team , Atlanta, Georgia , USA
2. Department of Anesthesiology, Critical Care, and Pain Medicine, Boston Children’s Hospital , Boston, Massachusetts , USA
3. Division of Pediatric Infectious Diseases, Department of Pediatrics, Vanderbilt University Medical Center , Nashville, Tennessee , USA
4. Department of Pediatrics, Baylor College of Medicine, Immunization Project, Texas Children’s Hospital , Houston, Texas , USA
5. Department of Pediatrics, Section of Critical Care Medicine, University of Colorado School of Medicine and Children's Hospital Colorado , Aurora, Colorado , USA
6. Division of Pediatric Critical Care Medicine, Nationwide Children’s Hospital , Columbus, Ohio , USA
7. The Center for Childhood Infections and Vaccines of Children’s Healthcare of Atlanta and the Department of Pediatrics, Emory University School of Medicine , Atlanta, Georgia , USA
8. Division of Critical Care Medicine, Department of Pediatrics, Emory University School of Medicine, Children’s Healthcare of Atlanta , Atlanta, Georgia , USA
9. Division of Critical Care Medicine, Department of Anesthesiology and Critical Care, Children’s Hospital of Philadelphia , Philadelphia, Pennsylvania , USA
10. Division of Pediatric Infectious Diseases, Department of Pediatrics, Children’s Mercy Kansas City , Kansas City, Missouri , USA
11. Division of Pediatric Critical Care, Department of Pediatrics, Children’s Hospital and Medical Center , Omaha, Nebraska , USA
12. Division of Pediatric Critical Care Medicine, Children’s Hospital of Michigan, Central Michigan University , Detroit, Michigan , USA
13. Division of Infectious Diseases, Department of Pediatrics, University of Mississippi Medical Center , Jackson, Mississippi , USA
14. Division of Critical Care Medicine, Department of Pediatrics, Akron Children’s Hospital , Akron, Ohio , USA
15. Division of Infectious Diseases, Children’s Hospital Los Angeles and Departments of Pediatrics and Molecular Microbiology and Immunology, University of Southern California , Los Angeles, California , USA
16. Division of Pediatric Hospital Medicine, UC San Diego–Rady Children’s Hospital , San Diego, California , USA
17. Department of Pediatrics, University of North Carolina at Chapel Hill Children's Hospital , Chapel Hill, North Carolina , USA
18. Division of Critical Care Medicine, Department of Pediatrics, Northwestern University Feinberg School of Medicine, Ann & Robert H. Lurie Children's Hospital of Chicago , Chicago, Illinois , USA
19. Division of Pediatric Critical Care Medicine, Department of Pediatrics, Mott Children’s Hospital and University of Michigan , Ann Arbor, Michigan , USA
20. Division of Pediatric Critical Care Medicine, Medical University of South Carolina , Charleston, South Carolina , USA
21. Department of Pediatrics, Medical University of South Carolina , Charleston, South Carolina , USA
22. Division of Pediatric Critical Care, Department of Pediatrics, Cooperman Barnabas Medical Center , Livingston, New Jersey , USA
23. The Ryan White Center for Pediatric Infectious Disease and Global Health, Department of Pediatrics, Indiana University School of Medicine , Indianapolis, Indiana , USA
24. Division of Cardiology, Department of Pediatrics, Louisiana State University Health Sciences Center and Children’s Hospital of New Orleans , New Orleans, Louisiana , USA
25. Divisions of Pediatric Infectious Diseases and Pediatric Critical Care Medicine, Department of Pediatric and Adolescent Medicine, Mayo Clinic , Rochester, Minnesota , USA
26. Division of Pediatric Critical Care Medicine, Department of Pediatrics, University of Alabama at Birmingham , Birmingham, Alabama , USA
27. Section of Pediatric Critical Care, Department of Pediatrics, Arkansas Children's Hospital , Little Rock, Arkansas , USA
28. Division of Critical Care Medicine, UCSF Benioff Children's Hospital, Oakland, California , USA
29. Divisions of Critical Care Medicine and Allergy, Immunology, and Bone Marrow Transplant, Department of Pediatrics, University of California, San Francisco , San Francisco, California , USA
30. Department of Pediatrics, Division of Critical Care Medicine, University of Texas Southwestern, Children’s Medical Center, Dallas, Texas , USA
31. Division of Pediatric Critical Care, Department of Pediatrics, University of Utah , Salt Lake City, Utah , USA
32. Division of Pediatric Critical Care, University of Minnesota Masonic Children’s Hospital , Minneapolis, Minnesota , USA
33. Departments of Anesthesia and Pediatrics, Harvard Medical School , Boston, Massachusetts , USA