1. Department of Ophthalmology, A. Fiorini Hospital, Terracina, University of Roma “La Sapienza”, Roma
2. Ophthalmology, S.M. Goretti Hospital, Latina
3. Department of Surgical Specialties, Ophthalmology Clinic, University of Messina, Messina
4. Department of Ophthalmology, Policlinico Umberto I, Roma, University of Roma “La Sapienza”, Roma - Italy