1. Department of Neurology and Neurophysiology University Medical Center Freiburg Freiburg Germany
2. Department of Neurology University Medical Center Basel Basel Switzerland
3. Neuromuscular Diseases Unit/ALS Clinic Kantonsspital St. Gallen St. Gallen Switzerland
4. Multidisciplinary Pain Center University Medical Center Freiburg Freiburg Germany
5. Department of Neurology and Clinical Neurophysiology Medical Center Esslingen Academic Teaching Hospital of the University of Tübingen Esslingen Germany