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. 2020 Dec 14;11:590598. doi: 10.3389/fphar.2020.590598

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Copyright © 2020 Andrade, Rangel, Santos, Freitas, Soares, Siqueira, Barh, Góes-Neto, Birbrair and Azevedo

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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Antiviral research distribution for the 22 selected drugs. (A) Most relevant countries for the selected drugs between 2003 and 2020. (B) Number of times cited per drug.