Boynton, Paul
Di Ventra, Massimiliano
Article History
Received: 24 November 2015
Accepted: 12 April 2016
First Online: 3 May 2016
Change Date: 20 May 2016
Change Type: Update
Change Details: The version of this Article previously published quoted an incorrect abbreviation for Massimiliano Di Ventra in the 'How to cite this article' section. This has now been corrected in the PDF and HTML versions of the paper.
Competing interests
: The authors declare no competing financial interests.