Neurofilament levels as biomarkers in asymptomatic and symptomatic familial amyotrophic lateral sclerosis - Weydt, Patrick; Oeckl, Patrick; Huss, Andre; Müller, Kathrin; Volk, Alexander E.; Kuhle, Jens; Knehr, Antje; Andersen, Peter M.; Prudlo, Johannes; Steinacker, Petra; Weishaupt, Jochen H.; Ludolph, Albert C.; et al. (Annals of neurology, 2016)