Koivu, Aki
Sairanen, Mikko
Article History
Received: 20 December 2019
Accepted: 11 March 2020
First Online: 25 March 2020
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee (include name of committee + reference number) and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The data provided by the National Center of Health Statistics is publicly available for research. For the analysis of data provided by the New York City Department of Health and Mental Hygiene, IRB approval was granted.