1. Department of Neurology, Otto-von-Guericke University, Magdeburg, Germany
2. German Center for Neurodegenerative Diseases (DZNE), Magdeburg, Germany
3. Center for Behavioral Brain Sciences (CBBS), Magdeburg, Germany
4. Department of Neurology, Center for ALS and other Motor Neuron Disorders, Charité - Universitätsmedizin Berlin, Berlin, Germany
5. Ambulanzpartner Soziotechnologie APST GmbH, Berlin, Germany
6. Department of Neurology, Hannover Medical School, Hannover, Germany