1. Ophthalmology Department, University Hospital of Henares, Madrid, Spain,
2. University Francisco de Vitoria, Madrid, Spain,
3. Neurology Department, University Hospital La Princesa, Madrid, Spain,
4. Ophthalmology Department, University Hospital Doce de Octubre, Madrid, Spain,
5. Rementeria Eye Clinic, Madrid, Spain,
6. Neurology Department, Infanta Cristina University Hospital, Madrid, Spain,
7. School of Optometry, Complutense University, Madrid, Spain,