Funding for this research was provided by:
Liaison Committee between the Central Norway Regional Health Authority (RHA) and the Norwegian University of Science and Technology (NTNU).
Text and Data Mining valid from 2018-04-27
Received: 9 March 2018
Accepted: 4 April 2018
First Online: 27 April 2018
Ethics approval and consent to participate
: The Regional committee for research ethics approved the study (approval number 2013/754). Patients, and parents of patients < 18 years, in the cohort study, gave written consent.
: The authors declare that they have no competing interests.
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