Received: 15 December 2021
Accepted: 4 July 2022
First Online: 26 August 2022
: The Research Ethics Committee of Helsinki University approved the study. None of the patients were contacted during the study as the study is purely register-based. As we had no contact with patients, no written consents were obtained. All methods were carried out in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
: Not applicable.
: The authors declare that there is no conflict of interest.