Acknowledgements
We thank Miriam H. Meisler, Department of Human Genetics, University of Michigan, USA for kindly providing us primers sequences and PCR conditions for FIG4 amplification.
This work was partly supported by grant ‘La sclerosi laterale amiotrofica (SLA) e le gravi malattie del motoneurone: dai meccanismi molecolari alla presa in carico del paziente’, Regione Liguria, to GLM and PM. The authors are also grateful to patients and their families for participation in the studies and ongoing support.
Declaration of interest: The authors report no conflicts of interest. The authors alone are responsible for the content and writing of the paper.