[1] Turin Univ, Als Ctr, Rita Levi Montalcini Dept Neurosci, Turin, Italy
[2] NIA, NIH, Neuromuscular Dis Res Sect, Lab Neurogenet, Bethesda, MD 20892 USA
[3] AOU Citta Salute & Sci Turin, Neurol 1, Turin, Italy
[4] AOU Citta Salute & Sci Turin, Lab Genet, Dept Clin Pathol, Turin, Italy
[5] NIA, NIH, Biocomputat Grp, Lab Neurogenet, Bethesda, MD 20892 USA
[6] Uniformed Serv Univ Hlth Sci, Dept Anat Physiol & Genet, Bethesda, MD 20814 USA
[7] NIA, Neurodegenerat Dis Res Unit, NIH, Bethesda, MD 20892 USA
[8] Univ Piemonte Orientale, Maggiore Carita Hosp, Neurol, Novara, Italy
[9] Amedeo Avogadro Univ Eastern Piedmont, Dept Hlth Sci, Interdisciplinary Res Ctr Autoimmune Dis, Novara, Italy