Funding for this research was provided by:
The Norwegian Extra Foundation for Health and Rehabilitation (2016FO75645)
Text and Data Mining valid from 2019-01-16
First Online: 16 January 2019
Compliance with Ethical Standards
: The authors declare that they have no conflict of interest.
: The work described here and all procedures involving human participants were in accordance with the standards for Ethical Principles of Psychologists, as put forth by the American Psychological Association, as well the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the Regional Committee for Medical and Health Research Ethics in Norway, and participants provided written informed consent.