1. Ophthalmic Clinic, Department of Medicine and Aging Science, Ophthalmic Clinic, University G. d'Annunzio of Chieti-Pescara, Chieti, Italy
2. Ophthalmology Unit, Department of Neurological, Neuropsychological, Morphological and Movement Sciences, University of Verona, Verona, Italy
3. Ophthalmic Clinic, Department of Surgical Science, University of L'Aquila, L'Aquila, Italy