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. 2017 Jun 3;18(6):1189. doi: 10.3390/ijms18061189

Figure 2.

Figure 2

BDNF concentrations at “Baseline” (T1), “2 hrs storage at room temperature” (T2), “After 2nd freeze/thaw cycle” (T3), and “6 months storage at −80 °C” (T5). (A) Serum samples, (B) EDTA-plasma samples. Grey box: 24.9% acceptable change limit as calculated with the inter-assay precision declared by the manufacturer of the BDNF ELISA kit [20]. All error bars are SEM. BDNF: brain-derived neurotrophic factor, EDTA: ethylenediaminetetraacetic acid, ELISA: enzyme-linked immunosorbent assay, hrs: hours, SEM: standard error of the mean.