Funding for this research was provided by:
Ministry of Education and Research, Norway
Text and Data Mining valid from 2018-10-17
Received: 18 October 2017
Accepted: 27 September 2018
First Online: 17 October 2018
Ethics approval and consent to participate
: Approval was obtained from the Norwegian Social Science Data Services (NSD; project number 45723). The Regional Committee for Medical and Health Research West-Norway (REK west) evaluated this project as “not mandatory to submit” (Ref. number 2015/2249). The participants received information regarding the purpose of the study; they were assured that the digital questionnaires were to be treated in confidence and that no participants could be identified in the published material. Their written consent to participate in the study was given at the start of the survey.
: 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.