Funding for this research was provided by:
Academy of Finland (272041)
Text and Data Mining valid from 2018-10-25
Received: 6 August 2018
Revised: 17 October 2018
Accepted: 18 October 2018
First Online: 25 October 2018
Compliance with ethical standards
: All authors declare that they have no conflict of interest.
: This article does not contain any studies with human participants or animals performed by any of the authors.