Correction to: Nature Protocols https://doi.org/10.1038/s41596-018-0028-3, published online 24 September 2018

In the version of this paper originally published, the present address of W.A. McEwan was accidentally omitted. This address (UK Dementia Research Institute, Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK) has now been added as affiliation 3, and the equal-contributions note has been updated to affiliation 4. These changes are reflected in the PDF and HTML versions of the protocol.