1. Department of Pediatrics, Emory University School of Medicine, Atlanta, Georgia, USA
2. Children’s Healthcare of Atlanta, Atlanta, Georgia, USA
3. Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
4. Center for Asthma Research, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
5. Respiratory Viruses Branch, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
6. Viral Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
7. Department of Biostatistics, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
8. University of Pittsburgh, UPMC Children's Hospital of Pittsburgh, Pittsburgh, Pennsylvania, USA
9. Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA