1. Department of Ophthalmology, Faculty of Medicine, Cairo University, Cairo, Egypt
2. Department of Clinical Nutrition, Children Cancer Hospital, Cairo, Egypt
3. Department of Ophthalmology, Lahey Hospital & Medical Center, Beth Israel Lahey Health, Peabody, MA, USA
4. Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
5. Department of Ophthalmology, Tufts University School of Medicine, Boston, MA, USA
6. Department of Ophthalmology, Armed Forces College of Medicine, Cairo, Egypt
7. Department of Ophthalmology, Faculty of Medicine, Minya University, Minya, Egypt
8. Department of Neurology, Lahey Hospital & Medical Center, Beth Israel Lahey Health, Burlington, MA, USA
9. Department of Neurology, Tufts University School of Medicine, Boston, MA, USA