1. Parkinson Institute, ASST G.Pini-CTO, ex ICP, Milan, Italy;
2. Department of Food Environmental and Nutritional Sciences (DeFENS), International Center for the Assessment of Nutritional Status (ICANS), University of Milan, Milan, Italy;
3. Clinical Nutrition and Dietetics Unit, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy