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. Author manuscript; available in PMC: 2013 Jul 10.
Published in final edited form as: Brain Stimul. 2012 Mar 30;5(2):116–123. doi: 10.1016/j.brs.2012.03.007

Figure 5.

Figure 5

The mean of natural-log transformed k-value (ln(k)) for the S-DD and T-DD conditions. Error bars represent the standard errors of the mean. *P < 0.05, paired-sample t-test (two-tailed).