1. First Ophthalmology Department, “G.gennimatas” Hospital, National and Kapodistrian University of Athens, Athens, Greece
2. 2nd Department of Ophthalmology, National and Kapodistrian University of Athens, Athens, Greece
3. Department of Ophthalmology, University of Patras, Patras, Greece
4. Ophthalmiatrion Athinon, Athens Eye Hospital, Athens, Greece