1. Ophthalmology Research Unit, “Santiago Grisolia,” Department of Ophthalmology, University Hospital Doctor Peset, Valencia
2. Department of Ophthalmology, Hospital La Inmaculada de Huercal-Overa, Almeria
3. Department of Ophthalmology, Torrecárdenas Hospital, Almería
4. Department of Ophthalmology, Punta de Europa Hospital, Algeciras, Cádiz - Spain