Elfving, Andreas
Harila-Saari, Arja
Nilsson, Ludwig
Berntson, Lillemor http://orcid.org/0000-0003-3962-0453
Funding for this research was provided by:
Dept of Women's and Children's Health, Uppsala university
Reumatikerförbundet (R-968023)
Gillbergska stiftelsen
Uppsala University
Article History
Received: 17 October 2022
Accepted: 5 July 2023
First Online: 15 July 2023
Declarations
:
: The study was approved by the regional ethics committee in Uppsala County (reference 2006/327; 2006/327/1; 2006/327/3; 2021–01614). Verbal informed consent was obtained from parents and children. Written informed consent was obtained from the parents and from children at the age of twelve or older. Participation was voluntary and participants could withdraw at any time without giving a reason.
: Not applicable.
: The authors declare no competing interests.