1. Inserm U913, Nantes, France
2. University Nantes, Nantes, France
3. CHU Nantes, Department of Neurology, Nantes, France
4. Inserm CIC 00-04, Nantes, France
5. CHU Nantes, Department of Neurology, Institut des Maladies de l'Appareil Digestif, Nantes, France