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. 2016 Sep 28;10:479. doi: 10.3389/fnhum.2016.00479

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Copyright © 2016 Wu, Tseng, Huang, Hu, Juan, Hsu and Lin.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Correlation between VSWM span and NCV in DPN patients. VSWM span from the backward-recall-with-interference CBT was significantly correlated with peripheral neuropathy state measured via NCV in the DPN patients (Pearson correlation: 0.530, p = 0.035; red line). The correlation diminished (blue line) after DLPFC tDCS (Pearson correlation: -0.026, p = 0.922) due to the improvement of VSWM span in the lower-performing patients. VSWM, visuospatial working memory; NCV, nerve conduction velocity; DPN, diabetic polyneuropathy; DLPFC, dorsolateral prefrontal cortex; tDCS, transcranial direct current stimulation.