1. Referral Center for ALS and Neuromuscular Diseases, Timone University Hospital, Aix-Marseille University, France
2. Aix-Marseille Université, CNRS, CRN2M-UMR7286, Marseille, France
3. Neuromuscular Diseases Unit, Hospital de la Santa Creu i Sant Pau, Universitat Autónoma de Barcelona, Barcelona, Spain
4. IRCCS, C. Mondino National Neurological Institute, Pavia, Italy
5. MRC Centre for Neuromuscular Diseases, National Hospital for Neurology and Neurosurgery, UCL Institute of Neurology, Queen Square, London, United Kingdom
6. Department of Neurology, Gui de Chauliac Hospital, Montpellier University Hospital Center, Montpellier, France
7. Department of Neurology, Mishima Hospital, Niigata, Japan