Funding for this research was provided by:
Horizon 2020 Framework Programme (Grant agreement number: 634201)
Text and Data Mining valid from 2018-06-26
Received: 11 July 2017
Accepted: 18 April 2018
First Online: 26 June 2018
Ethics approval and consent to participate
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.