Hadler-Olsen, Elin
Jönsson, Birgitta
Article History
Received: 11 January 2021
Accepted: 10 May 2021
First Online: 13 May 2021
Declarations
:
: The study was performed in accordance with the Declaration of Helsinki 1975, as revised in 2008, and was approved by the regional committees for medical and health research ethics of the University of Tromsø, Norway (2013/348/REK Nord). All patients were informed about possible risks and benefits as well as the procedures of the study and all gave written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.