1. Department of Medicine and Science of Ageing, Section of Ophthalmology, University “G. D'Annunzio,” Chieti - Pescara
2. Department of Biomedical Science, Laboratory of Biostatistics, University “G. D'Annunzio” of Chieti and Ce.S.I., Clinical Research Centre of “G. D'Annunzio” University Foundation, Chieti - Italy