C9orf72 repeat expansions are restricted to the ALS-FTD spectrum.

Ticozzi, N; Tiloca, C; Calini, D; Gagliardi, S; Altieri, A; Colombrita, C; Cereda, C; Ratti, A; Pezzoli, G; Borroni, Barbara; Goldwurm, S; Padovani, Alessandro; Silani, V.