Funding for this research was provided by:
Innlandet Hospital Trust, Brumunddal, Norway
Text and Data Mining valid from 2018-12-01
Received: 27 April 2018
Accepted: 14 August 2018
First Online: 3 December 2018
Ethics approval and consent to participate
: The study was approved by the Regional Committee for Medical and Health Research Ethics in South-eastern Norway (number 2012/966) and written informed consent was obtained from each participant.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.