1. Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genova, IRCCS AOU San Martino-IST, Genova,
2. ALS Centre ‘Rita Levi Montalcini’ Department of Neuroscience, University of Torino, Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genova, IRCCS AOU San Martino-IST, Genova,
3. Biostatistics Unit, Department of Health Sciences, University of Genova, IRCCS AOU San Martino-IST, Genova, and
4. Fondazioni Serena ONLUS, ‘La Colletta’ Hospital, Service of Rehabilitation of Neuromuscular Diseases, Arenzano, Genova, Italy