Funding for this research was provided by:
state prevention council schleswig-holstein
Article History
Accepted: 5 December 2023
First Online: 22 December 2023
Compliance with Ethical Standards
:
: The authors declare no competing interests.
: Prior written informed consent was obtained from the parents of all participants who were included in the study.
: All procedures followed were in accordance with the Helsinki Declaration of 1975, as revised in 2000. The survey was authorized by the state school authorities of Schleswig-Holstein, Germany.