Funding for this research was provided by:
Text and Data Mining valid from 2018-09-05
Received: 23 July 2018
Accepted: 29 August 2018
First Online: 5 September 2018
Ethics approval and consent to participate
: No ethical approval was required according to Danish legislation. However, all study phases have been carried out under strict consideration to the Danish Code of Conduct for Research Integrity [ CitationRef removed ] and the Declaration of Helsinki [ CitationRef removed ].
: Not applicable.
: The authors declare that they have no competing interests.
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