Funding for this research was provided by:
Forskningsrådet om Hälsa, Arbetsliv och Välfärd (2013-04-02)
Text and Data Mining valid from 2019-10-24
Received: 18 March 2019
Accepted: 12 October 2019
First Online: 24 October 2019
Compliance with ethical standards
: Authors declare no conflicts of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the Stockholm ethical review board (Dnr 2014/233-31/4) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants included in the study.