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Authors
Hannula, Ossi https://orcid.org/0000-0001-5391-279X
Vanninen, Ritva
Rautiainen, Suvi
Mattila, Kalle
Hyppölä, Harri
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Article History
Received: 17 August 2020
Accepted: 19 January 2021
First Online: 2 February 2021
Ethics approval and consent to participate
: The authors assert that all procedures contributing to this work comply with the ethical standards of the relevant national and institutional guidelines on human experimentation (Finland) and with the Helsinki Declaration of 1975, as revised in 2008. Permission from the Northern Savo hospital district ethical board was obtained on 25th July 2017 (Number 268/2017). The study is registered in ClinicalTrials.gov (Identifier: NCT03327688). Consent from patients was not required.
: Not applicable.
: The first author, OH, is the owner of a small company Ultra-Mestarit Oy providing ultrasound education to medical professionals. The other authors declare that they have no competing interests.
