1. Outpatient Center for ALS and other Motor Neuron Disorders, Charité – Universitätsmedizin Berlin, Berlin, Germany,
2. Department of Neurology, Outpatient Center for ALS and other Motor Neuron Disorders, Alfried Krupp Krankenhaus, Essen, Germany,
3. Hans Berger Department of Neurology, University Hospital Jena, Jena, Germany,
4. Department of Neurology, Medizinische Hochschule Hannover, Hannover, Germany,
5. Department of Neurology, Outpatient Center for ALS and other Motor Neuron Disorders, Berufsgenossenschaftliches Universitätsklinikum Bergmannsheil, Bochum, Germany,
6. Department of Neurodegenerative Diseases and Gerontopsychiatry, University of Bonn, Bonn, Germany,
7. Department of Neurology, University of Ulm, Ulm, Germany,
8. Department of Neurology, Universitätsklinikum Leipzig, Leipzig, Germany,
9. Department of Neurology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany,
10. Department of Neurology, Technische Universität Dresden, Dresden, Germany,
11. Research Site Dresden, German Center for Neurodegenerative Diseases (DZNE), Dresden, Germany,
12. Department of Neurology, Diakonissenkrankenhaus Mannheim, Mannheim, Germany,
13. Department for Sleep Medicine and Neuromuscular Disorders, Universitätsklinikum Münster, Münster, Germany, and
14. Ambulanzpartner Soziotechnologie APST GmbH, Berlin, Germany