Funding for this research was provided by:
Received: 9 February 2021
Accepted: 13 April 2021
First Online: 26 April 2021
: Ethics approval was granted by the Regional Ethical Review Board in Gothenburg, Sweden (reference numbers 271–14, T695–14 and 2020–00072). Informed consent for this register-based study was waived by the ethics committee. All methods were carried out in accordance with relevant guidelines and regulations.
: Not applicable.
: FG is employed by a research and development unit at Region Stockholm, and CR is partly contracted by the same organisation. The reform being analysed was initiated by Region Stockholm, but the region had no part in the design, execution, results or conclusions of this study.