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Authors
Prommik, Pärt https://orcid.org/0000-0003-3603-4918
Kolk, Helgi
Maiväli, Ülo
Pääsuke, Mati
Märtson, Aare
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Article History
Received: 9 January 2020
Accepted: 7 June 2020
First Online: 20 June 2020
Compliance with ethical standards
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: The authors declare that there is no conflict of interest.
: The study was approved by the Research Ethics Committee of the University of Tartu on 17 June, 2013 (reference 227/T-12) and by the Estonian Data Protection Inspectorate for the use of personalized data on 1 December, 2017 (reference 2.2.-1/17/47).
