1 Department of Ophthalmology and Visual Sciences, Washington University in St. Louis School of Medicine, St. Louis, Missouri; Department of Neurology, Washington University in St. Louis School of Medicine, St. Louis, Missouri.
2 University of Toronto, Ontario, Canada.
3 Departments of Neurology, Ophthalmology, and Neurosurgery, Indiana University School of Medicine, Indianapolis, Indiana.
4 Department of Ophthalmology and Visual Sciences, Washington University in St. Louis School of Medicine, St. Louis, Missouri.
5 Department of Ophthalmology, Emory University, Atlanta, Georgia; Department of Neurology, Emory University, Atlanta, Georgia; Department of Neurological Surgery, Emory University, Atlanta, Georgia.
6 Department of Ophthalmology, Emory University, Atlanta, Georgia; Department of Neurology, Emory University, Atlanta, Georgia. Electronic address: vbiouss@emory.edu.