1. Children’s National Hospital, Division of Infectious Diseases, Washington, District of Columbia, USA
2. Children’s National Hospital, Department of Microbiology, Washington, District of Columbia, USA
3. Maryland Department of Health, Baltimore, Maryland, USA
4. Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
5. Division of Healthcare Quality Promotion, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA