1. Department of Ophthalmology, Ramón y Cajal University Hospital, Carretera de Colmenar Km 9, 1, 28034 Madrid, Spain
2. Department of Surgery, Alcalá de Henares University, Madrid, Spain
3. Medical Retina Department, Moorfields Eye Hospital, London, UK
4. Department of Neurology, Ramón y Cajal University Hospital, Madrid, Spain