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Authors
Maijala, Anna http://orcid.org/0000-0002-7537-7908
Kinnunen, Hannu
Koskimäki, Heli
Jämsä, Timo
Kangas, Maarit
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Article History
Received: 21 December 2018
Accepted: 12 November 2019
First Online: 29 November 2019
Ethics approval and consent to participate
: Ethical statement (reference number 2/2017) was obtained from the Ethics Committee of Human Sciences, University of Oulu, Finland. A written consent was obtained from all study participants.
: There are no identifiable details included.
: Hannu Kinnunen (HKi) and Heli Koskimäki (HKo) are employed by Oura Health, and Anna Maijala (AM) received a one month salary worth grant from Oura Health. As a company, Oura Health had no involvement in data analyses, interpretation or preparation of the article. All other authors of this paper declare no competing interests.
