Stattin, Håkan http://orcid.org/0000-0002-3739-8185
Amnå, Erik http://orcid.org/0000-0001-8311-0982
Article History
Received: 20 March 2022
Accepted: 24 June 2022
First Online: 8 July 2022
Compliance with Ethical Standards
:
: The authors declare no competing interests.
: The study was approved by the regional Ethics Committee at Uppsala, Sweden (Dnr 2010/115). This study was carried out in compliance with the Good Research Practice issued by the Swedish Research Council.
: Informed consent was obtained annually from the parents of the adolescent participants up until they were 16-years-old.