1. Department of Neurology, Perelman School of Medicine; University of Pennsylvania; Philadelphia PA USA
2. Division of Neurology; Children’s Hospital of Philadelphia; Philadelphia PA USA
3. Department of Biostatistics and Epidemiology; University of Pennsylvania; Philadelphia PA USA
4. Neuro-Ophthalmology Service, Division of Ophthalmology; Children’s Hospital of Philadelphia; Philadelphia PA USA
5. Department of Ophthalmology & Visual Sciences; University of British Columbia; Vancouver CA Canada
6. Division of Endocrinology & Diabetes; Children’s Hospital of Philadelphia; Philadelphia PA USA
7. Department of Neurology & Neurotherapeutics; University of Texas Southwestern Medical Center; Dallas TX USA
8. Department of Ophthalmology; University of Texas Southwestern Medical Center; Dallas TX USA