Updates are available Correction dated 2015-03-04

Article History

First Online: 29 December 2014

Change Date: 13 February 2015

Change Type: Clarification

Change Details: Owing to an editing error, the original version of this article did not make it clear what prevented Rabih Murr from practising R — he was preparing a paper for publication. The text has been updated to reflect this.

Change Date: 4 March 2015

Change Type: Correction

Change Details: A Correction to this paper has been published:

Change Details: https://doi.org/10.1038/519120a

Free to read: This content has been made available to all.