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Authors
Witten, Adam https://orcid.org/0000-0002-8933-1142
Clausen, Mikkel B.
Thorborg, Kristian
Attrup, Mikkel L.
Hölmich, Per
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Article History
Received: 1 June 2017
Accepted: 8 March 2018
First Online: 17 March 2018
Compliance with ethical standards
:
: The authors declare to have no financial or non-financial competing interests.
: The project was approved by the Danish Data Protection Agency, and has also been evaluated by the Capitol Region Committee on Health Research Ethics in Denmark, where it was evaluated as not requiring formal ethical approval (H-3-2013-FSP29).
