Funding for this research was provided by:
University of Gothenburg
Received: 23 November 2021
Accepted: 8 February 2022
First Online: 1 March 2022
: The Regional Ethic Review board in Gothenburg, Sweden, approved the study (Dnr 519-16). The study was carried out in accordance with the Declaration of Helsinki. Consent to participate was waived since this was a retrospective register study on anonymized data.
: Not applicable.
: The authors declare that they have no competing interests.