Di Muro, M. A.
La Rocca, C. E.
Stanley, H. E.
Havlin, S.
Braunstein, L. A.
Article History
Received: 9 December 2015
Accepted: 22 February 2016
First Online: 9 March 2016
Change Date: 26 April 2017
Change Type: Update
Change Details: A correction has been published and is appended to both the HTML and PDF versions of this paper. The error has been fixed in the paper.
Competing interests
: The authors declare no competing financial interests.