1. Department of Medicine and Health Sciences “Vincenzo Tiberio”, University of Molise, Campobasso, Italy
2. Department of Ophthalmology, University Magna Græcia, Catanzaro, Italy
3. Department of Ophthalmology, University of Catania, Catania, Italy
4. Department of Ophthalmology, Santa Croce e Carle Hospital, Cuneo, Italy
5. Department of Ophthalmology, Azienda Ospedaliera dei Colli-Ospedale Monaldi, Naples, Italy
6. Department of Ophthalmology, Ludwigshafen Hospital, Ludwigshafen am Rhein, Germany