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. 2011 Aug 26;6(8):e23997. doi: 10.1371/journal.pone.0023997

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Luo 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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Upper panel: fMRI experimental paradigm (only the first run is shown); lower panel: examples of two types of stimuli presented in the LFF or RFF. +: fixation point; a/a′ and b/b′: two paired characters lists, matched one-to-one for the numbers of strokes, radicals, and overall frequency.