Funding for this research was provided by:
Stiftelsen Alma och K. A. Snellman Säätiö
Päivikki ja Sakari Sohlbergin Säätiö
Received: 1 February 2021
Accepted: 1 May 2021
First Online: 2 July 2021
: Permission to use the databases was obtained from the SII and the National Institute for Health and Welfare. According to Finnish legislation, no ethical committee approval or patients’ informed consent is required for register-based studies done without contacting study subjects.
: Not applicable.
: The authors declare that they have no competing interests.