1. Neurology Unit, Department of Clinical and Experimental Medicine University of Pisa Pisa Italy
2. Unit of Pharmacology and Pharmacovigilance, Department of Clinical and Experimental Medicine University of Pisa Pisa Italy
3. Unit of Histology and Embryology, Department of Clinical and Experimental Medicine University of Pisa Pisa Italy
4. Department of Medical Specialties Neurology Unit, AOUP Pisa Italy
5. Gastrointestinal Unit, Department of Translational Research and New Technologies in Medicine and Surgery University of Pisa Pisa Italy
6. Department of Surgery and Gastroenterology Tuscany North‐West ASL, Pontedera Hospital Pisa Italy
7. Anatomia Patologica 2 Azienda Ospedaliero‐Universitaria Pisana Pisa Italy
8. Section of Statistics University Hospital Pisa Italy
9. Center for Neurodegenerative Diseases, Unit of Neurology, Parkinson's Disease and Movement Disorders, Department of Clinical and Experimental Medicine University of Pisa Pisa Italy