Funding for this research was provided by:
Ministeriet Sundhed Forebyggelse ([grant number 1403120])
Text and Data Mining valid from 2018-10-30
Received: 2 July 2018
Accepted: 8 October 2018
First Online: 30 October 2018
Ethics approval and consent to participate
: All users were informed of the aim of the study and gave their written consent to participate. The study was conducted in compliance with the Helsinki Declaration and was approved by the Danish Data Protection Agency (SDC-2015-035 LIP) and processed by the National Committee on Health Research Ethics (H-15006076).
: Not applicable.
: The authors declare that they have no competing interests.
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