1. Nantes Université, CHU Nantes, INSERM, The enteric nervous system in gut and brain disorders Nantes France
2. Unit of Histology and Embryology Department of Clinical and Experimental Medicine University of Pisa Pisa Italy
3. Parkinson disease and Movement Disorders Unit Neurology Service, Hospital Clínic de Barcelona Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS) University of Barcelona (UB) Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED: CB06/05/0018‐ISCIII) Barcelona Spain
4. Neurological Tissue Bank of the Biobank—Hospital Clínic de Barcelona Universitat de Barcelona Barcelona Spain
5. Division of Neuropathology and Neurochemistry, Department of Neurology Medical University of Vienna Vienna Austria