1. Gerontology and Geriatrics Research Laboratory, I.R.C.C.S. “Casa Sollievo della Sofferenza”, San Giovanni Rotondo (FG), Italy
2. U.O.C. of Neurology, “Agostino Gemelli” General Hospital, Catholic University School of Medicine, Rome, Italy
3. Centre for Ageing Brain and Neurodegenerative Disorders, Neurology Unit, University of Brescia, Brescia, Italy
4. Gastroenterology Research Laboratory, I.R.C.C.S. “Casa Sollievo della Sofferenza”, San Giovanni Rotondo (FG), Italy
5. Laboratories of Biotechnology, Azienda Ospedaliera “Spedali Civili”, Brescia, Italy