1. Laboratorio di Malattie Neurologiche, IRCCS-Istituto Mario Negri, Milano, Italy,
2. Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari “Aldo Moro”, Bari, Italy,
3. Unit of neurodegenerative Diseases, Department of Clinical Research in Neurology, University of Bari “Aldo Moro”, at “Pia Fondazione Cardinale G. Panico”, Lecce, Italy,
4. Centro SLA, Dipartimento di Neuroscienze ‘Rita Levi Montalcini’, Università di Torino, Torino, Italy,
5. Department of Neurorehabilitation Sciences, Casa Cura Policlinico, CCP, Milano, Italy,
6. Centro Clinico NEMO, Fondazione Serena Onlus, ASST Grande Ospedale Metropolitano Niguarda, Milano, Italy,
7. INSERM, U1094, Tropical Neuroepidemiology, Limoges, France,
8. Univ. Limoges, UMR_S 1094, Tropical Neuroepidemiology, Institute of Neuroepidemiology and Tropical Neurology, CNRS FR 3503 GEIST, Limoges, France,
9. Academic Unit of Neurology, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland,
10. Clinic of Neurology Clinical Center Serbia, School of Medicine, Belgrade, Serbia,
11. Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genova, Genova, Italy,
12. Unit of Neurology, Spedali Civili di Brescia, Brescia, Italy,
13. Department of Neurology, Ospedale di Esine, Brescia, Italy,
14. Divisione Neurologica, Ospedale di Gallarate, Gallarate, Italy,
15. Department of Neurology, Institute of Experimental Neurology, Division of Neuroscience, San Raffaele Scientific Institute, Milan, Italy,
16. ALS Unit, University of Milano-Bicocca, Monza, Italy,
17. Department of Neurology, Azienda Ospedaliera della Provincia di Lodi, Lodi, Italy