Article History
First Online: 15 June 2016
Change Date: 17 June 2016
Change Type: Correction
Change Details: This article originally said that it costs the United Kingdom £250 million per week to be in the EU. In fact, it is £161 million per week. The text has been corrected.
Change Date: 22 June 2016
Change Type: Correction
Change Details: A Correction to this paper has been published:
Change Details: https://doi.org/10.1038/534449a
Free to read: This content has been made available to all.