1. Department of Pediatrics, Division of Infectious Diseases, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
2. University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
3. Department of Biochemistry and Molecular Biology, Center for Infectious Disease Dynamics, The Huck Institutes of the Life Sciences, Pennsylvania State University, State College, Pennsylvania, USA
4. Department of Pathology and Laboratory Medicine, Division of Protective Immunity and Division of Cancer Pathobiology, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
5. Department of Pediatrics, Division of Infectious Diseases, University of Alabama at Birmingham, Birmingham, Alabama, USA