Funding for this research was provided by:
EkstraStiftelsen Helse og Rehabilitering (2017/FO148974)
Received: 23 July 2019
Accepted: 9 January 2020
First Online: 7 February 2020
Ethics approval and consent to participate
: The study was approved by the South Eastern Regional Committee for Medical and Health Research Ethics in Norway (2016/1749) and was conducted according to the code of ethics of the Helsinki Declaration [CitationRef removed]. Oral and written consent was obtained from all nurses, parents and children ≥12 years. Children < 12 years gave oral consent.
: Not applicable.
: The authors have no competing interests.