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. 2019 May 29;12:143. doi: 10.3389/fnmol.2019.00143

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Copyright © 2019 Yeung, Georgieva, Atanasov and Tzvetkov.

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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Publication trend. (A) Publication trend of monoamine oxidase (MAO) publications. There has been a continuous research interest (apparent as a linear growth of publication counts) since the 1990s. (B) Detailed comparison of annual total academic publications and annual MAO publications. The former was extracted from PubMed database using MEDSUM (http://webtools.mf.uni-lj.si/public/medsum.html), because Web of Science does not allow such a search query.