1 Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee, USA Department of Pathology, Microbiology, and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee, USA Elizabeth B. Lamb Center for Pediatric Research, Vanderbilt University School of Medicine, Nashville, Tennessee, USA terry.dermody@vanderbilt.edu.
2 Department of Microbiology and Molecular Genetics, University of California, Irvine, California, USA.
3 Department of Molecular Biology, Princeton University, Princeton, New Jersey, USA.