1. Department of Medicine and Aging Science; Ophthalmology 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. Department of Medicine, Surgery and Neuroscience; Ophthalmology Clinic; University of Siena; Siena Italy
4. Department of Medicine and Aging Science; Laboratory of Clinical Epidemiology and Aging; University G. d'Annunzio of Chieti-Pescara; Chieti Italy