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. 2021 Apr 21;47(3):665–675. doi: 10.1007/s00068-021-01654-8

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 5 — Development of daily total OP cases before, during and after the COVID-19 shutdown. The solid lines describe the development in the CTRL-period (blue) in 2019, pre-shutdown (green), shutdown (red) and post-shutdown (orange) period in 2020. Dotted lines indicate the beginning and end of the shutdown period (first line: Mar 16th 2020, second line: Apr 20th 2020)