1. Division of Infectious Diseases, Duke University School of Medicine , Durham, North Carolina , USA
2. Pediatric Infectious Disease and Immunology, Levine Children’s Hospital , Charlotte, North Carolina , USA
3. Division of Infectious Diseases and Global Medicine, Department of Medicine, University of Florida , Gainesville, Florida , USA
4. Department of Pediatrics, Division of Infectious Diseases, Baylor College of Medicine , Houston, Texas , USA