1. Fondazione IRCCS Istituto Neurologico Carlo Besta, Department of Clinical Neurosciences, Parkinson and Movement Disorders Unit, Milan, Italy
2. Previous address: Parkinson Institute, ASST Gaetano Pini-CTO, Milan, Italy
3. Clinical Nutrition and Dietetics Unit, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
4. Korle Bu Teaching Hospital, Accra, Greater Accra region, Ghana
5. Komfo Anokye Teaching Hospital, Kumasi, Ashanti region, Ghana
6. Father Novati Catholic Hospital, Sogakope, Volta region, Ghana
7. Parkinson Institute, ASST Gaetano Pini-CTO, Milan, Italy
8. Fondazione Grigioni per il Morbo di Parkinson, Milan, Italy