Accepted: 23 March 2021
First Online: 3 May 2021
: The study was approved by the Regional Committee for Medical and Health Research Ethics in Vest Norway (approval No. 2017/297/REK vest). All participants had signed a written informed consent on agreement about using of routine and research data for this purpose and for taking part in the study.
: Participants have consented for publication.
: The authors declare that they have no competing interests.