Text and Data Mining valid from 2018-04-13
Received: 24 February 2017
Accepted: 22 December 2017
First Online: 13 April 2018
Ethics approval and consent to participate
: The local ethics committee of North Denmark Region approved the study (2011–0200). All participants were required to give written informed consent accompanied by their parents’ consent. The study was conducted according to the Declaration of Helsinki.
: The manuscript does not contain data from any individual person in a form that could be offensive to anyone but written informed consent for all patients was collected.
: The authors declare that they have no competing interests.
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