Serum and CSF NfL were measured with the Simoa Human Nf-Light Advantage kit using a fully automated SIMOA® HD-1 analyzer based on a Single-Molecule Array technology (Quanterix, Lexington, MA, United States) (Sampedro et al., 2020 (link)). Quantitative measurements of NfL in blood by Simoa technology have been shown to be reliable (Soylu-Kucharz et al., 2017 (link)). More details on the processing of samples in the cohort can be read in the biologic’s manual for PPMI1 (Kang et al., 2013 (link)).
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