1. Department of Ophthalmology, Blanton Eye Institute, Houston Methodist Hospital, Houston, USA
2. Department of Ophthalmology, The University of Jordan, Amman, Jordan
3. Department of Ophthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, USA
4. Departments of Ophthalmology, Neurology, and Neurosurgery, Weill Cornell Medicine, New York, New York, USA
5. Department of Ophthalmology, University of Texas MD Anderson Cancer Center, Houston, USA
6. Texas A and M College of Medicine, Bryan, Texas, USA