Macharey, Georg http://orcid.org/0000-0002-3337-3896
Toijonen, Anna
Hinnenberg, Pia
Gissler, Mika
Heinonen, Seppo
Ziller, Volker
Article History
Received: 20 December 2019
Accepted: 29 April 2020
First Online: 14 May 2020
Compliance with ethical standards
:
: The authors state explicitly that there are no conflicts of interest in connection with this article. All authors declare independence from any funding agency for this work.
: Authorization to use the data was obtained from the National Institute for Health and Welfare as required by the national data protection legislation law in Finland (reference number THL/1200/5.05.00/2012).