1. Department of Ophthalmology, Oftalmar; Vithas Medimar International Hospital; Alicante Spain
2. Foundation for the Visual Quality; FUNCAVIS; Alicante Spain
3. Department of Ophthalmology; Universitary Clinical Hospital “Lozano Blesa”; Zaragoza Spain
4. School of Medicine; University of Zaragoza; Zaragoza Spain
5. Health Research Institute Foundation (IIS) Aragón; Zaragoza Spain
6. Universitary Hospital La Princesa; Madrid Spain
7. Department of Ophthalmology; Poznan City Hospital; Poznań Poland
8. University of Warmia and Mazury; Olsztyn Poland