Hjelle, Anja M. http://orcid.org/0000-0003-0684-7723
Gjertsen, Jan-Erik
Apalset, Ellen M.
Nilsen, Roy M.
Lober, Anja
Tell, Grethe S.
Mielnik, Pawel
Funding for this research was provided by:
Universitetet i Bergen
Article History
Received: 10 July 2020
Accepted: 26 November 2020
First Online: 4 December 2020
Ethics approval and consent to participate
: All participants signed a written informed consent form, and the study protocol was approved by the Regional Committee for Medical and Health Research Ethics (REC West).
: Not applicable.
: The authors declare that they have no competing interests.