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. 2020 Jan 24;10:1425. doi: 10.3389/fneur.2019.01425

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Copyright © 2020 Wang, Liu, Song, Cui, Liu, Christoforou, Flaherty, Luo, Wood and Wang.

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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Pearson's correlation coefficients graph between age and identified metabolites in the two groups (A) Arginine vs. Age, (B) Glutamate vs. Age, (C) Proline vs. Age, (D) Threonine vs. Age, (E) Leucine-isoleucine vs. Age.