Funding for this research was provided by:
Stiftelsen Kristian Gerhard Jebsen
Norwegian National Research Network for ADHD (810986, 812891)
Received: 15 July 2020
Accepted: 11 February 2021
First Online: 19 February 2021
Ethics approval and consent to participate
: This study is approved by the Regional Committees for Medical and Health Research Ethics Region West in Norway (REK-Vest, 2015/2325). All participants gave written consent to participate in the study.
: Not applicable.
: The authors declare that they have no competing interests.