CSF sTREM2 is elevated in a subset in GRN-related frontotemporal dementia - van der Ende, Emma L (Alzheimer Center Rotterdam and Dept. of Neurology. Erasmus University Medical Center) ; Morenas-Rodriguez, Estrella (Ludwig-Maximilians-Universität München) ; McMillan, Corey T. (Penn Frontotemporal Degeneration Center. University of Pennsylvania Perelman School of Medicine) ; Grossman, Murray (Penn Frontotemporal Degeneration Center. University of Pennsylvania Perelman School of Medicine) ; Irwin, David J. (Penn Frontotemporal Degeneration Center. University of Pennsylvania Perelman School of Medicine) ; Sanchez-Valle, Raquel (Institut d'Investigacions Biomèdiques August Pi i Sunyer) ; Graff, Caroline (Unit of Hereditary Dementia. Theme Aging. Karolinska University Hospital-Solna) ; Vandenberghe, Rik (Laboratory for Cognitive Neurology. Department of Neurosciences. Leuven Brain Institute) ; Pijnenburg, Yolande (Alzheimer Center Amsterdam. Department of Neurology. Amsterdam Neuroscience. Vrije Universiteit Amsterdam) ; Laforce, Robert Jr (Clinique Interdisciplinaire de Mémoire du CHU de Québec. département des Sciences Neurologiques. Université Laval) ; Le Ber, Isabelle (Sorbonne Université. Paris Brain Institute. Institut du Cerveau. ICM. Inserm U1127. CNRS UMR 7225. APHP. Hôpital Pitié-Salpêtrière) ; Lleó, Alberto (Institut d'Investigació Biomèdica Sant Pau) ; Haass, Christian (Munich Cluster for Systems Neurology (SyNergy)) ; Suárez-Calvet, Marc (German Center for Neurodegenerative Diseases (DZNE) Munich) ; van Swieten, John Cornelis (Alzheimer Center Rotterdam and Dept. of Neurology. Erasmus University Medical Center) ; Seelaar, Harro (Alzheimer Center Rotterdam and Dept. of Neurology. Erasmus University Medical Center)