1. Departments of Pediatrics,
2. Biostatistics,
3. Health Policy, and
4. Emergency Medicine, Vanderbilt University Medical Center, Nashville, Tennessee;
5. Centers for Disease Control and Prevention, Atlanta, Georgia;
6. Department of Pediatrics, University of Utah Health Sciences Center, Salt Lake City, Utah;
7. Department of Pediatrics, University of Tennessee Health Science Center, Memphis, Tennessee;
8. Departments of Pediatrics and Medicine, Emory University School of Medicine, Atlanta, Georgia; and
9. Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois