1. Ophthalmology Department, University of Ioannina, Ioannina, Greece
2. Sussex Eye Hospital, Brighton and Sussex University Hospitals NHS Trust, Brighton, UK
3. 3rd University Department of Ophthalmology, AHEPA Hospital, Thessaloniki, Greece
4. Clínica Novovisión, Madrid, Spain
5. Ophthalmology Department, Rey Juan Carlos Universitary Hospital, Móstoles, Madrid, Spain
6. 1st University Department of Ophthalmology, Aristotle University, Thessaloniki, Greece
7. Department of Ophthalmology, Hospital Universitario “Principe de Asturias”, University of Alcalá, Alcalá de Henares, Spain