Received: 28 June 2021
Accepted: 24 February 2022
First Online: 14 March 2022
: All methods were performed in accordance with the Declaration of Helsinki and haven been approved by the South-Eastern Regional Committee for Medical and Health Research Ethics (reference number 158909) and the data protection office of Innlandet Hospital Trust, Norway (reference number 135540). All study participants signed an informed consent.
: Not applicable.
: ML, MB and NC declare that they have no competing interests. LL has a temporary part-time engagement as an external consultant for the Norwegian Directorate of Health.