Funding for this research was provided by:
Forskningsrådet om Hälsa, Arbetsliv och Välfärd (2014-2008,)
Text and Data Mining valid from 2019-05-14
Received: 8 June 2018
Accepted: 10 April 2019
First Online: 14 May 2019
Compliance with ethical standards
: The project was approved by the Regional Ethical Review Board in Stockholm, Sweden (no. 2007/762-31 2012/863-32).
: The authors declare that they have no conflict of interest.