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Authors
Kvalevaag, Anne lise
Aβmus, Jörg
Biringer, Eva
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Article History
Accepted: 13 January 2021
First Online: 28 January 2021
Compliance with Ethical Standards
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: The authors declare that they have no competing interests.
: All procedures performed in the study were in accordance with the ethical standards of the National Committees of Medical and Health Research Ethics and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. The study was approved by the Regional Committee of Medical and Health Research Ethics (Ref. No. 2010-3204) and the Norwegian Social Science Data Service (Reference No. 53392).
: Informed consent was obtained from all individual participants included in the study.
