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. 2018 Dec 11;9:1079. doi: 10.3389/fneur.2018.01079

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Copyright © 2018 Purnell, Thijs and Buchanan.

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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(A) Double plotted day/night differences in serotonin (5-HT) levels in different tissues of humans and rodents [redrawn with permission from Rao et al. (141); Mateos et al. (142); Agren et al. (132)]. (B) Double plotted day/night differences in norepinephrine (NE) and Monoamine oxidase A (MAOA) in different tissues of humans and rodents [redrawn with permission from (132, 143–145)]. (C) Double plotted day/night differences in adenosine (ADO) and its metabolizing agents in different tissues of humans and rodents [redrawn with permission from (146–148)].