1. Children's Mercy, Department of Pathology and Laboratory Medicine, Kansas City, MO, USA;
2. School of Medicine, Department of Pathology and Laboratory Medicine, University of Missouri-Kansas City, MO, USA;
3. Children's Mercy, Department of Infectious Diseases, Kansas City, MO, USA;
4. School of Medicine, Department of Pediatrics, University of Missouri-Kansas City, MO, USA;
5. Department of Infectious Diseases, Washington University in St. Louis, St. Louis, MO, USA;
6. Department of Laboratory Medicine, University of Washington, Seattle, WA, USA;
7. University of Washington, Pediatric Infectious Diseases, Seattle, WA, USA;
8. The Children's Hospital of Philadelphia, Division of Infectious Diseases, PA, USA