1. Department of Neurology, University Hospital Düsseldorf, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany
2. Centre for Neuromuscular Disease, National Hospital for Neurology and Neurosurgery, Queen Square, London, United Kingdom
3. Department of Neuromuscular Disease, Institute of Neurology, University College London, London, United Kingdom
4. College of Medicine, Veterinary and Life Sciences, University of Glasgow, Glasgow, United Kingdom
5. Department of Neurology, Medical University of Vienna, Vienna, Austria
6. Brain and Mind Center, University of Sydney, Sydney, Australia
7. Department of Neurology, Palacky University, Olomouc, Czech Republic