Correction to: Nature Chemistry https://doi.org/10.1038/s41557-020-00623-9, published online 29 January 2021.

In the version of this News & Views originally published, in Fig. 1b, the text ‘POEGMEA’ should have read ‘POEGMEMA’. At the bottom of Fig. 1c, in the black structure labelled ‘POEGMEA’, the opening bracket labelled ‘m’ should have appeared one bond to the left. Additionally, the penultimate sentence in the Fig. 1 caption incorrectly read ‘POEGMEMA polymer chains are used in systems releasing active drugs by scission of both non-covalent and covalent bonds’; it should have read ‘The two related polyacrylates bearing oligo(ethylene glycol) side chains — POEGMEMA and POEGMEA — enable release of active drugs by scission of non-covalent and covalent bonds, respectively’. These errors have now been corrected.