1. Ophthalmology Service, University Hospital Sant Joan, Institut de Investigacio Sanitaria Pere Virgili (IISPV), University of Rovira & Virgili, Reus, Spain
2. Department of Ophthalmology, Retina Section, Hospital Universitario de Canarias, Tenerife, Spain
3. Department of Ophthalmology, University Hospital Valladolid, Ocular Diabetes Unit of IOBA, Valladolid, Spain