Funding for this research was provided by:
Päivikki and Sakari Sohlberg Foundation (none)
Helsinki University State Reserach funding (none)
Received: 28 July 2019
Accepted: 10 December 2019
First Online: 31 December 2019
Change Date: 30 July 2020
Change Type: Correction
Change Details: An amendment to this paper has been published and can be accessed via the original article.
Ethics approval and consent to participate
: This study was conducted with the permission of Helsinki University Hospital and Helsinki University Hospital Ethics Committee (TMK03 §162, 300/13/03/03/2015, final changes accepted 16.6.2016). A separate permission by the Finnish Institute for Health and Welfare, Finland, was granted to use the register data. Consent to participate: not applicable.
: Not applicable.
: The authors declare that they have no competing interests.