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Authors
Lystad, Reidar P. http://orcid.org/0000-0003-0506-0902
Brown, Benjamin T.
Swain, Michael S.
Engel, Roger M.
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Article History
Received: 24 April 2020
Accepted: 20 July 2020
First Online: 21 September 2020
Ethics approval and consent to participate
: This study was exempt from ethics approval because it uses tabular data that is in the public domain.
: Not applicable.
: The authors declare that they have no competing interests.
