Funding for this research was provided by:
Strategic Research Council (292466 for 2015–20)
Suomalainen Tiedeakatemia (No. 2016-2019)
Text and Data Mining valid from 2018-12-17
Received: 26 September 2018
Accepted: 29 November 2018
First Online: 17 December 2018
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: This study was conducted in compliance with APA ethical standards. It was approved by the Ethics Committee of the University of Jyväskylä, and has been registered at ClinicalTrials.gov.
: Informed consent was obtained from all the participants of the study.