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Authors
Toijonen, Anna E. https://orcid.org/0000-0002-4812-2766
Heinonen, Seppo T.
Gissler, Mika V. M.
Macharey, Georg
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Funding
Funding for this research was provided by:
Helsinki University Hospital Research Grant
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Article History
Received: 5 July 2019
Accepted: 9 November 2019
First Online: 18 November 2019
Compliance with ethical standards
:
: We declare that we have no conflict of interest.
: For this type of study, formal consent is not required. The National Institute for Health and Welfare authorized to use the data (reference number THL/652/5.05.00/2017).
