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. 2013 Jun 24;8(6):e66190. doi: 10.1371/journal.pone.0066190

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© 2013 Liu 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 properly credited.

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A, the P2 topography at 180-220 ms post-stimuli. B: the CNV topography at 800-1600 ms post-stimuli. C, the ERP waveforms (at FCz electrode site) in response to the 1.5-s tone. D, the ERP waveforms (at FCz electrode site) in response to the 2.5-s tone.