1. Eye Clinic Section, Department of Surgical Sciences, University of Turin, Turin, Italy
2. Department of Medical Science, Neuroscience and Sense Organs, Eye Clinic, University of Bari, Bari, Italy
3. Eye Clinic, Hospital “SS. Annunziata”, ASL Taranto, Taranto, Italy
4. Department of Medical, Surgical and Experimental Sciences, University of Sassari, Sassari, Italy