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. 2021 Oct 20;12:723394. doi: 10.3389/fendo.2021.723394

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Copyright © 2021 de Leijer, Metman, van der Hoorn, Brouwers, Kruijff, van Hemel, Links and Westerlaan

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 Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) flow chart. ¹⁸F-FDG PET/CT, ¹⁸F-Fluorodeoxyglucose Positron Emission Tomography with Computed Tomography; FTI, Focal Thyroid Incidentaloma.