“Poly-GP in cerebrospinal fluid links C9orf72-associated dipeptide repeat expression to the asymptomatic phase of ALS/FTD” has been published in the journal EMBO Molecular Medicine. This work was supported in part by JPND through the SOPHIA project, selected in the 2011 Biomarkers call, the BIOMARKAPD project, selected in the 2011 Biomarkers call, the PreFrontAls project, selected in the 2013 Preventive Strategies call, and the STRENGTH project, selected in the 2012 Risk Factors call.