Affiliation: | aDivision of Ophthalmology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania;bNeuro-Oncology Service, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania;cNeuro-Ophthalmology Service, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania;dDepartment of Neurology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania;eDepartment of Ophthalmology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania;fDepartment of Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania;gDepartment of Biostatistics and Epidemiology, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania |