Funding for this research was provided by:
Received: 5 September 2019
Accepted: 3 May 2020
First Online: 27 May 2020
Ethics approval and consent to participate
: The study (project number 2017/345) was approved by the Regional Committees for Medical and Health Research Ethics in Norway and adhered to the tenets of the Declaration of Helsinki. Written informed consent was obtained from all subjects.
: Written informed consent was obtained from all subjects.
: The authors report no competing interests.