Received: 21 May 2020
Accepted: 29 March 2021
First Online: 9 April 2021
: The Regional Committees for Medical and Health Research Ethics, More and Romsdal, Sor-Trondelag and Nord-Trondelag, assessed the study but considered that the project did not fall within its mandate (ref. 2016/1800/REK midt). Norwegian Centre for Research Data (NSD) was notified and approved the research project (ref. 50736). All participants, as well as the parents or guardians of the young people, received an information letter describing the confidential and voluntary nature of the study. All participants and one parent or guardian of the young person signed the information letter by way of giving consent.
: Not applicable.
: The authors have no competing interests.