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. 2019 Aug 20;11:220. doi: 10.3389/fnagi.2019.00220

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Copyright © 2019 Jo, Nho and Saykin.

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(s) 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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PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) Flow Chart. From a total of 389 hits on Google scholar and PubMed search, 16 articles were included in the systematic review.