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. 2021 Apr 1;9:587459. doi: 10.3389/fpubh.2021.587459

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Copyright © 2021 Gjoneska, Jones, Vella, Bonanno, Flora, Fontalba-Navas, Hall, Ignjatova, Kirtava, Moreno Sanjuán, Vaz-Rebelo and Sales.

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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The diagram depicts the process of selecting relevant studies that consider the ethical aspects of citizens involvement in planning stages of research. It is prepared in accordance with the PRISMA standards for selection of studies and reporting of items for systematic reviews and meta-analyses. The targeted search through comprehensive databases (Web of Science, Scopus, and PubMed), was followed by screening of retrieved studies, and concluded with final selection of relevant articles.