1. Department of Pediatrics, Division of Pediatric Infectious Diseases, Vanderbilt University Medical Center, Vanderbilt University , Nashville, Tennessee , USA
2. Department of Biostatistics, Vanderbilt University Medical Center , Nashville, Tennessee , USA
3. Department of Pathology and Laboratory Medicine, University of Missouri-Kansas City and Children’s Mercy Hospital , Kansas City, Missouri , USA
4. Department of Pediatrics, University of Missouri-Kansas City and Children’s Mercy Kansas City , Kansas City, Missouri , USA
5. Department of Pediatrics, College of Medicine, University of Cincinnati and Division of Infectious Diseases, Cincinnati Children’s Hospital , Cincinnati, Ohio , USA
6. Department of Pediatrics, School of Medicine and Dentistry, University of Rochester , Rochester, New York , USA
7. Department of Pediatrics, University of California at Los Angeles Mattel Children’s Hospital and University of California at Los Angeles , Los Angeles, California , USA
8. Department of Pediatrics, Baylor College of Medicine, Houston, Texas, Texas Children’s Hospital , Houston, Texas , USA
9. Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas. Texas Children’s Hospital , Houston, Texas , USA
10. Department of Pediatrics, University of Washington School of Medicine and Seattle Children’s Hospital , Seattle, Washington , USA
11. Department of Pediatrics, School of Medicine, University of Pittsburgh and University of Pittsburgh Medical Center Children’s Hospital of Pittsburgh , Pittsburgh, Pennsylvania , USA
12. Division of Viral Diseases, Centers for Disease Control and Prevention , Atlanta, Georgia , USA