1. Division of Pediatric Infectious Diseases, Children’s National Hospital and Research Institute, Washington, DC
2. Department of Pediatrics, The George Washington University School of Medicine and Health Sciences, Washington, DC
3. Department of Microbiology, Immunology and Tropical Medicine, The George Washington University School of Medicine and Health Sciences, Washington, DC
4. Division of Laboratory Medicine and Pathology, Children’s National Hospital and Research Institute, Washington, DC
5. Department of Pathology, The George Washington University School of Medicine and Health Sciences, Washington, DC