Received: 28 June 2021
Accepted: 15 December 2021
First Online: 9 January 2022
: According to the Norwegian Health Research Act, health services research does not require a REC approval. This study was notified to the Norwegian Centre for Research Data, which deemed this study as health services research and assessed the study to be in accordance with relevant guidelines and regulations (Project number 505265). The study protocol was approved by the Data Protection Officer at Oslo University Hospital. Each participant provided written informed consent to participate. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable
: The authors declare no conflict of interest.