1. Ophthalmology Department, “Santo Spirito” Hospital, AUSL Pescara Pescara, Italy
2. Ophthalmology Department, “Maria Paternò Arezzo” Hospital, ASP 7 Ragusa, Ragusa, Italy
3. Ophthalmology Department, “De Gironcoli” Hospital, AULSS 2 Marca trevigiana, Conegliano, Italy