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Assessment of correlation between CSF Aβ42 levels measured in CLEIA, Luminex, and ELISA across three weekly runs. For each subject, four frozen 500 μL aliquots were thawed, pooled, and realiquoted. On the first day of each week, aliquots were thawed for analysis on the three platforms. In the correlational figures, CLEIA measures are presented on the X-axis, and the ELISA and Luminex measures are presented on the Y-axis.
