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. 2020 Aug 25;11:1080. doi: 10.3389/fphys.2020.01080

FIGURE 4.

FIGURE 4

Correlation between natural-log-transformed plasma and serum BDNF (ln-pBDNFS1 and sBDNFS1, respectively) measured in blood samples drawn immediately after 15 min of rest at pretest (S1). Analysis was performed for the whole sample using Pearson product-moment correlation coefficient (r) and its p-value. BDNF, brain-derived neurotrophic factor. df, degrees of freedom of the test statistic. The level of significance was set at p < 0.05.