Gudbrandsdottir, Gigja http://orcid.org/0000-0002-5325-5483
Aarstad, Helene H.
Bostad, Leif
Hjelle, Karin M.
Aarstad, Hans J.
Bruserud, Øystein
Tvedt, Tor Henrik Anderson
Beisland, Christian
Article History
Received: 22 April 2020
Accepted: 25 June 2020
First Online: 3 July 2020
Compliance with ethical standards
:
: The authors declare that they have no competing interests. The authors alone are responsible for the content and writing of the paper.
: The study was approved by the Regional Committee for Medical Research Ethics in Western Norway (78/05), and the database was approved by the Norwegian Social Science Data Services.
: All patients were given oral and written information about the study, and they gave written informed consent.