Ødegård, Siv Steinsmo http://orcid.org/0000-0001-9341-6336
Tran, Thuy
Næss-Pleym, Lars E.
Risnes, Kari
Døllner, Henrik
Article History
Received: 2 January 2020
Accepted: 12 January 2021
First Online: 23 January 2021
Ethics approval and consent to participate
: The study was approved by the institutional review board at St. Olavs University Hospital, who also approved coupling of anonym data in the two registries.
: Not applicable.
: The authors declare that they have no competing interests.