1. Department of Ophthalmology, “Lozano Blesa” University Clinic Hospital, San Juan Bosco 15, 50009 Zaragoza, Spain
2. Aragon Health Sciences Institute, Zaragoza, Spain
3. Department of Ophthalmology, University Hospital Arnau de Vilanova, Lleida, Spain
4. IRB-Lleida, Lleida, Spain
5. Department of Ophthalmology, Poznań City Hospital, Poznań, Poland
6. University of Warmia and Mazury, Olsztyn, Poland