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. 2018 Apr 10;12:233. doi: 10.3389/fnins.2018.00233

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Copyright © 2018 Xu, Fu, Liu, Qin, Liu, Jiang and Yu.

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) and the copyright owner 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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Intelligence differences among COMT genotypes in 256 participants. Bar plots depict the mean value and standard error. ^*P < 0.05. COMT, catechol-O-methyltransferase; FIQ, full-scale intelligence quotient; VIQ, verbal intelligence quotient.