1. Division of Neurology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
2. Department of Neurology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
3. Department of Neurology, Division of Neuroimmunology and Glial Biology, University of California, San Francisco, Los Angeles, USA
4. Division of Infectious Disease, Children's Hospital of Philadelphia, Philadelphia, PA, USA
5. Division of Ophthalmology, Children's Hospital of Philadelphia, Philadelphia, PA, USA
6. Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
7. Department of Ophthalmology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA