Acknowledgements
This work was partly supported by a grant ‘La Sclerosi Laterale Amiotrofica (SLA) e le gravi malattie del motoneurone: dai meccanismi molecolari alla presa in carico del paziente’ from Regione Liguria to PM.
We thank Gabriella Restagno, Laboratory of Molecular Genetics − AO OIRM Sant’Anna Torino, Italy, for kindly providing us with the PCR conditions for C9orf 72 amplification and DNAs control positive for the presence of the expansion.
The authors are also grateful to the patients and their families for participation in the studies and their ongoing support.
Declaration of interest: The authors report no conflict of interest. The authors alone are responsible for the content and writing of this article.