GRN and amyotrophic lateral sclerosis: In addition, we included samples from frontotemporal dementia (FTD) patients, carriers of the splicing mutation c.709-1G > A in the progranulin (PGRN) gene [23], patients with dementia with Lewy bodies (DLB), as well as patients suffering from Parkinson’s disease (PD), amyotrophic lateral sclerosis (ALS) and progressive supranuclear palsy (PSP) as other neurodegenerative disorders.