1. Department of Pediatric Neurology and Neurosciences, Children's Healthcare of Atlanta, and Emory University School of Medicine, Atlanta, Georgia, USA
2. Department of Pediatric Neurology, The University of Alabama at Birmingham, Birmingham, Alabama, USA
3. Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia, USA
4. Division of Infectious Diseases, Department of Medicine, Emory University, Atlanta, Georgia, USA.