Correction to: Communications Biology https://doi.org/10.1038/s42003-021-02432-3, published online 23 July 2021
In the original PDF version of this Article, the image for Fig. 2 was inadvertently replaced with the image from Fig. 3. The online version of the Article was not affected. The correct version of Fig. 2 is 
which replaces the previous incorrect version 
.
This error has now been corrected in the PDF version of the Article.
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van der Wee, E.B., Fokkema, J., Kennedy, C.L. et al. Publisher Correction: 3D test sample for the calibration and quality control of stimulated emission depletion (STED) and confocal microscopes. Commun Biol 4, 978 (2021). https://doi.org/10.1038/s42003-021-02515-1
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DOI: https://doi.org/10.1038/s42003-021-02515-1
