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. 2016 Sep 29;11(9):e0163853. doi: 10.1371/journal.pone.0163853

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© 2016 Ardizzi et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 2 — A) Mean congruent corrugator EMG activity for maltreated group (Mal) and control group (Con) during the visualization of facial expressions of negative emotions. * = p < 0.05. Error bars represent SE. B) Mean congruent zygomaticus EMG activity for maltreated group (Mal) and control group (Con) during the visualization of joy facial expressions.