Funding for this research was provided by:
Norges Forskningsråd (214187/F20)
Universitetet i Bergen (214187/F20)
Helse Vest (912148)
Text and Data Mining valid from 2019-06-01
Received: 11 December 2018
Accepted: 4 April 2019
First Online: 1 June 2019
Ethics approval and consent to participate
: Patients gave their written informed consent under institutional review board-approved protocols (Rek Vest project #19297 and #13025 and 273/96-82.96).
: All authors have agreed to publish this manuscript.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.