1. Department of Neurology, University of Ulm, Oberer Eselsberg 45, 89081 Ulm, Germany
2. Department of Neurology, University of Ulm, Ulm, Germany
3. Université de Strasbourg, INSERM, Mécanismes centraux et périphériques de la neurodégénérescence, Strasbourg, France
4. Department of Neurology, University of Ulm, Ulm, Germany; German Center for Neurodegenerative Diseases (DZNE), Ulm, Germany