Funding for this research was provided by:
the Swedish Research Council (2018-03035)
Swedish Research Council for Health, Working Life and Welfare (2018-00337)
Novo Nordisk Foundation (NNF19OC0057274)
the China Scholarship Council (student number 202006010041)
Received: 11 February 2022
Accepted: 21 June 2022
First Online: 12 August 2022
: The study was approved by the Swedish ethical review board (2021-02881). This study used nationwide register data managed by the Swedish National Board of Health and Welfare, and the researchers only had access to pseudonymized data. The researchers cannot identify any participant in order to obtain informed consent.
: Not applicable.
: The authors declare that they have no competing interests.