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. 2021 May 4;10(10):e018448. doi: 10.1161/JAHA.120.018448

Figure 5. Relationship between muscle sympathetic nerve activity (MSNA) frequency and total power (A), low frequency (LF) (B), standard deviation of NN intervals (SDNN) (C), and heart rate 20 to 30 minutes after diesel exhaust inhalation (D).

Figure 5

Pearson correlation coefficient tests were used and the line fitted using nonlinear regression with least squares fit.