Funding for this research was provided by:
Det Obelske Familiefond (27951)
TrygFonden Centre for Child Research (DK) (18480)
Innovation Fund Denmark (5155-00001B)
Text and Data Mining valid from 2018-07-04
Received: 25 January 2018
Accepted: 25 June 2018
First Online: 4 July 2018
Ethics approval and consent to participate
: The Central Denmark Region Committee on Health Research Ethics found that there was no biomedicine involved in the project and therefore no need for ethical approval (ref.no.172/2016). Approval was obtained from the Danish Data Protection Agency (ref.no. 62908/2016). Written participant consent was obtained from all parents.
: Not applicable.
: The authors declare that they have no competing interest.
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