Stella, Massimo http://orcid.org/0000-0003-1810-9699
Beckage, Nicole M.
Brede, Markus
De Domenico, Manlio http://orcid.org/0000-0001-5158-8594
Article History
Received: 7 August 2017
Accepted: 19 January 2018
First Online: 2 February 2018
Competing Interests
: The authors declare that they have no competing interests.