Funding for this research was provided by:
Academy of Finland
Jane ja Aatos Erkon Säätiö
National Institute for Health and Welfare
Received: 13 November 2019
Accepted: 27 October 2020
First Online: 10 November 2020
Ethics approval and consent to participate
: The authorization for register-linkage was obtained from the standing committee for register linkage studies at the NIHW (permission number THL/604/6.02.00/2016). The data used in this study was anonymised before the analyses. Further ethics statement was not needed based on the internal regulations.
: Not applicable.
: The authors declare that they have no competing interests.