Funding for this research was provided by:
Helse Sør-Øst RHF (2016002)
Received: 11 October 2020
Accepted: 19 February 2021
First Online: 25 February 2021
Ethics approval and consent to participate
: This study has been approved by the regional committee for medical and health research, REK Nord (REK number: 2015/171 & 2016/2306).
: Not applicable.
: IS was investigator in the drug trial Boehringer-Ingelheim 1346.0023.The other authors declare they have no competing interests.