Kleiven, Hanne H.
Ljunggren, Birgitte
Solbjør, Marit
Article History
Received: 20 December 2019
Accepted: 6 April 2020
First Online: 16 April 2020
Ethics approval and consent to participate
: The project was approved by the Norwegian Centre for Research Data (NSD reference no. 37655). All participants signed a written consent form before participating in the project.
: Not applicable.
: None of the authors have any competing interests.