Funding for this research was provided by:
Research Council of Norway (287884, 287884, 287884, 287884, 287884, 287884, 287884, 287884, 287884)
Received: 24 March 2021
Accepted: 30 June 2021
First Online: 15 July 2021
: The study protocol has been approved by the Regional Committee for Medical and Health Research Ethics (REC) West (2017/934) and by the Norwegian Data Protection Authority (17/01372). This study used de-identified administrative health care data from national registries, and REC West granted an exemption from the consent requirement (2017/934). All methods were performed in accordance with the relevant guidelines and regulations.
: Not applicable.
: The authors declare that they have no competing interests.