Funding for this research was provided by:
Text and Data Mining valid from 2019-04-12
Received: 8 February 2018
Accepted: 12 March 2019
First Online: 12 April 2019
Ethics approval and consent to participate
: The next of kin gave informed written or verbal consents that was approved by the National Committee on Danish Health Research Ethics who also approved (20-01-2014) the research protocol (version 2.0 number 1377517).
: Not applicable.
: The authors declare that they have no competing interests.
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