NEFL and frontotemporal dementia: The pGFAP level correlated with plasma and CSF NfL in FTD (Rho = 0.49, P < 0.001; Rho = 0.32, P < 0.02) and in CN (Rho = 0.4, P < 0.001; Rho = 0.3, P = 0.016), but not with CSF YKL-40.