Correction to: Gene Therapy https://doi.org/10.1038/s41434-021-00235-z, published online 04 March 2021

We have become aware of an error in Supplementary Fig. 2 of this paper. Two loading controls for a western blot (ɑ-Tubulin and GAPDH) were immunolabeled on the same membrane and thus showed a similar expression pattern. Due to an unfortunate oversight, we cropped and presented ɑ-Tubulin twice. We here provide a corrected Supplementary Fig. 2b, replacing the erroneous panels with a new one from the original immunoblot, that now shows both ɑ-Tubulin (Cell Signaling, Cat. # 3873) and GAPDH (Cell Signaling, Cat. # 2118S) expression. Of note, the interpretation of the presented data is unchanged.