1. Ophthalmology Department, University Hospital of Henares, Madrid, Spain
2. Department of Medicine, University Francisco de Vitoria, Madrid, Spain
3. Neurology Department, Clínico San Carlos University Hospital, Madrid, Spain
4. Neurology Department, Getafe University Hospital, Madrid, Spain
5. Ophthalmology Department, University Hospital Ramón y Cajal, Madrid, Spain
6. Clínica Rementería, Madrid, Spain