About the Authors

Giancarlo Logroscino

Roles Conceptualization, Data curation, Formal analysis, Methodology, Supervision, Writing – original draft, Writing – review & editing

giancarlo.logroscino@uniba.it

Affiliations Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari “Aldo Moro”, Bari, Italy, Unit of Neurodegenerative Diseases, Department of Clinical Research in Neurology, University of Bari “Aldo Moro”, at “Pia Fondazione Cardinale G. Panico“, Tricase, Lecce, Italy

Benoit Marin

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Resources, Writing – review & editing

Affiliations Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari “Aldo Moro”, Bari, Italy, Unit of Neurodegenerative Diseases, Department of Clinical Research in Neurology, University of Bari “Aldo Moro”, at “Pia Fondazione Cardinale G. Panico“, Tricase, Lecce, Italy, INSERM UMR1094, Tropical Neuroepidemiology, Limoges, France, University of Limoges, School of Medicine, Institute of Neuroepidemiology and Tropical Neurology, CNRS FR 3503 GEIST, Limoges, France, CHU Limoges, Centre d’Epidémiologie de Biostatistique et de Méthodologie de la Recherche, Limoges, France, Laboratorio di Malattie Neurologiche, Dipartimento di Neuroscienze, IRCCS Istituto di Ricerche Farmacologiche Mario Negri, Milano, Italy

Marco Piccininni

Roles Formal analysis, Methodology

Affiliation Unit of Neurodegenerative Diseases, Department of Clinical Research in Neurology, University of Bari “Aldo Moro”, at “Pia Fondazione Cardinale G. Panico“, Tricase, Lecce, Italy

Simona Arcuti

Roles Data curation

Affiliation Unit of Neurodegenerative Diseases, Department of Clinical Research in Neurology, University of Bari “Aldo Moro”, at “Pia Fondazione Cardinale G. Panico“, Tricase, Lecce, Italy

Adriano Chiò

Roles Conceptualization, Methodology, Writing – review & editing

Affiliations ALS Center, Department of Neuroscience, University of Turin, Turin, Italy, Neuroscience Institute of Turin (NIT), Turin, Italy, Institute of Cognitive Sciences and Technologies, C.N.R., Rome, Italy

Orla Hardiman

Roles Conceptualization, Data curation, Funding acquisition, Investigation, Methodology, Resources, Writing – review & editing

Affiliation Academic Unit of Neurology Trinity Biomedical Sciences Institute Trinity College Dublin, Dublin, Ireland

James Rooney

Roles Conceptualization, Data curation, Funding acquisition, Methodology, Resources, Writing – review & editing

Affiliation Academic Unit of Neurology Trinity Biomedical Sciences Institute Trinity College Dublin, Dublin, Ireland

Stefano Zoccolella

Roles Conceptualization, Data curation, Methodology, Writing – review & editing

Affiliation Department of Basic Medical Sciences, Neuroscience and Sense Organs, University of Bari “Aldo Moro”, Bari, Italy

Philippe Couratier

Roles Conceptualization, Data curation, Funding acquisition, Methodology, Writing – review & editing

Affiliations INSERM UMR1094, Tropical Neuroepidemiology, Limoges, France, University of Limoges, School of Medicine, Institute of Neuroepidemiology and Tropical Neurology, CNRS FR 3503 GEIST, Limoges, France, CHU Limoges, Service de Neurologie, Centre expert SLA, Limoges, France

Pierre-Marie Preux

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Methodology, Resources, Writing – review & editing

Affiliations Unit of Neurodegenerative Diseases, Department of Clinical Research in Neurology, University of Bari “Aldo Moro”, at “Pia Fondazione Cardinale G. Panico“, Tricase, Lecce, Italy, INSERM UMR1094, Tropical Neuroepidemiology, Limoges, France, University of Limoges, School of Medicine, Institute of Neuroepidemiology and Tropical Neurology, CNRS FR 3503 GEIST, Limoges, France

Ettore Beghi

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Methodology, Resources, Writing – review & editing

Affiliation Laboratorio di Malattie Neurologiche, Dipartimento di Neuroscienze, IRCCS Istituto di Ricerche Farmacologiche Mario Negri, Milano, Italy

for EURALS

Complete membership of the author group can be found in the Acknowledgments

Competing Interests

Philippe Couratier has received speaking honoraria form Cytokinetics and Effik. Orla Hardiman has received speaking honoraria from Novarits, Biogen Idec, Sanofi Aventis and Merck- Serono. She has been a member of advisory panels for Biogen Idec, Allergen, Ono Pharmaceuticals, Novartis, Cytokinetics and Sanofi Aventis. This does not alter our adherence to PLOS ONE policies on sharing data and materials.