Fig. 1: Correlations of NfL levels between assays and biofluids in the whole cohort and disease groups.

a Heatmap of Spearman correlation between assays in the whole cohort. b–d CSF/plasma correlations, stratified for disease, of NfLCLEIA, NfLSIMOA, and NfLELLA. CSF cerebrospinal fluid, MSA multiple system atrophy, PD Parkinson’s disease, PD-CI PD-cognitively impaired, PSP/CBS progressive supranuclear palsy/corticobasal syndrome.