Skaug, Eirunn
Czajkowski, Nikolai O.
Waaktaar, Trine
Torgersen, Svenn
Funding for this research was provided by:
Department of Psychology, University of Oslo
Norges Forskningsråd (288083, 170089, 213722 and 213760, 170089, 213722 and 213760)
Article History
Received: 23 February 2022
Accepted: 21 June 2022
First Online: 1 August 2022
Declarations
:
: The study was approved by the Norwegian Data Inspectorate and the Regional Committees for Medical and Health Research Ethics, ref. 2015/4 (19661). Informed consent was obtained from both the twins and their parents.
: Not applicable.
: The authors declare that they have no competing interests.