ALS phenotype is influenced by age, sex, and genetics: A population-based study.

Chiò A, Moglia C, Canosa A, Manera U, D'Ovidio F, Vasta R, Grassano M, Brunetti M, Barberis M, Corrado L, D'Alfonso S, Iazzolino B, Peotta L, Sarnelli MF, Solara V, Zucchetti JP, De Marchi F, Mazzini L, Mora G, Calvo A.