Junttila, Anna http://orcid.org/0000-0002-3103-9966
Helminen, Olli
Väyrynen, Juha P. http://orcid.org/0000-0002-8683-2996
Ahtiainen, Maarit
Kenessey, Istvan
Jalkanen, Sirpa
Mecklin, Jukka-Pekka
Kellokumpu, Ilmo
Kuopio, Teijo
Böhm, Jan
Mrena, Johanna
Article History
Received: 9 December 2019
Revised: 14 August 2020
Accepted: 26 August 2020
First Online: 18 September 2020
Ethics approval and consent to participate
: The Central Finland Central hospital ethics committee approved the study and the need to obtain informed consent from the study patients was waived by the National Authority for Medicolegal Affairs (VALVIRA). All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1964 and later versions. The study was not registered due to retrospective nature.
: Anonymised data is available upon request from the corresponding author.
: The authors declare no conflict of interest.
: This study was funded by the Finnish State Research Funding (O.H.), the Instrumentarium Science Foundation (O.H.) and the Mary and Georg C. Ehrnrooth Foundation (O.H.).