1. CHU Clermont-Ferrand; Neurology Department; CHU Gabriel Montpied, Clermont-Ferrand; France
2. Université Clermont 1; UFR Medecine; EA7280; Clermont-Ferrand; France
3. Alzheimer Centre Reina Sofia Foundation and CIBERNED; Carlos III Institute of Health; Madrid Spain
4. CHU Clermont-Ferrand; DRCI, Biostatistics Unit, Clermont-Ferrand F; France
5. CHU Clermont-Ferrand; Department of Psychiatry B; CHU Gabriel Montpied, Clermont-Ferrand F-63000; France
6. Rush University; Department of neurological Sciences; Section of Movement Disorders; Chicago Illinois USA
7. Sobell Department of Motor Neuroscience & Movement Disorders; UCL Institute of Neurology and the National Hospital for Neurology and Neurosurgery; Queen Square London UK
8. Movement Disorder Unit; Department of Psychiatry and Neurology; CHU de Grenoble, Joseph Fourier University and INSERM, Unité 836, Grenoble Institut des Neurosciences; 38043 Grenoble France
9. University; Hospital Toulouse; Neurology Department; CHU Purpan; Toulouse France
10. Hospices Civils de Lyon, Hopital Neurologique Pierre Wertheimer; Neurologie C Lyon France
11. Santé publique; CHU de Clermont-Ferrand; 63058 Clermont-Ferrand; France
12. UPMC Paris 6; Inserm CRICM UMR-S975; Neurology Department; Hôpital de la Salpêtrière, Assistance Publique Hôpitaux de Paris; France
13. Neurology and Movement Disorders Department; Lille University Medical Center; Lille France
14. University of Bordeaux, Institut des Maladies Neurodégénératives, CNRS UMR 5293 et CHU de Bordeaux; France
15. Neurology Department; CIC INSERM-0802; CHU de Poitiers 86021 Poitiers cedex; INSERM U 1084, Laboratoire de Neurosciences Expérimentales et Cliniques, Université de Poitiers