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. 2020 Apr 15;11:213. doi: 10.3389/fendo.2020.00213

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Copyright © 2020 Castagneto-Gissey, Casella-Mariolo, Casella and Mingrone.

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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Bariatric/metabolic operations performed worldwide by region between 2014 and 2018 This figure is original and based on data from Welbourn et al. [7].