Funding for this research was provided by:
EkstraStiftelsen Helse og Rehabilitering
Received: 3 July 2020
Accepted: 11 January 2021
First Online: 22 January 2021
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, 2017/2194). According to article 12 of the United Nations Convention on the Rights of the Child, children (0–18 years) have the right to express their views on all matters affecting them [CitationRef removed]. Oral and written consent was obtained from parents and children ≥12 years. Children ≥16 years gave their independent written consent. Children < 12 years gave oral consent. All data were stored in the Services for Sensitive Data Unit (TSD) at the University of Oslo. Results have been presented without individually recognizable data, but quotations have been exposed in terms of the context and age.
: Not applicable.
: The authors have declared that they have no competing interests.