1. 2nd Department of Ophthalmology, “ATTIKON” University Hospital, University of Athens, Athens - Greece
2. 2nd Department of Ophthalmology, “Ophthalmiatrion” Hospital, Athens - Greece
3. 1st Department of Ophthalmology, University of Athens, Athens - Greece
4. “OMMA” Eye Center, Athens - Greece
5. Department of Ophthalmology, University of Crete, Crete - Greece