1. Department of Pediatrics, University of California San Diego School of Medicine and Rady Children’s Hospital of San Diego, San Diego, California
2. Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, Utah
3. Departments of Pediatrics, and Biostatistics and Epidemiology, University of Pennsylvania School of Medicine, and Division of Infectious Diseases, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
4. Department of Pediatrics, Rhode Island Hospital, Providence, Rhode Island
5. Pulmonary Division, Seattle Children’s Hospital, Seattle Washington
6. Department of Pediatrics, Children's Mercy Hospital, Kansas City, Missouri
7. Department of Pediatrics, Baylor College of Medicine, Houston, Texas
8. Department of Emergency Medicine, Cleveland Clinic, Cleveland, Ohio
9. Department of Pediatrics, University of Texas Southwestern, Dallas, Texas
10. Centers for Disease Control and Prevention, Atlanta, Georgia
11. Department of Pediatrics, University of Missouri–Kansas City School of Medicine, Kansas City, Missouri
12. Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia
13. Department of Pediatrics, McFarland Clinic, Ames, Iowa