Linden, J.
Widström, E.
Sinkkonen, J.
Article History
Received: 4 December 2019
Accepted: 26 March 2020
First Online: 21 April 2020
Ethics approval and consent to participate
: Ethical Committee approval for this study was not necessary according to Finnish law and the obligations of the National Institute for Health and Welfare (THL). This study was considered to be routine work (quality assurance) at THL and the Department’s Director approved the data collection. Also submitted as a separate file.
: Not applicable.
: The authors declare that they have no competing interests.