1. Department of Neurodegeneration; Hertie Institute for Clinical Brain Research; Tübingen Germany
2. German Center for Neurodegenerative Diseases; Tübingen Germany
3. Department of Neurology; University of Innsbruck; Innsbruck Austria
4. Department of Neurology; University of Homburg/Saar; Homburg/Saar Germany
5. Department of Geriatric Rehabilitation; Robert-Bosch-Hospital; Stuttgart Germany