Weitkamp, Katharina
Seiffge-Krenke, Inge
Article History
Received: 1 July 2018
Accepted: 7 September 2018
First Online: 27 September 2018
Compliance with Ethical Standards
:
: The authors declare that they have no conflict of interest.
: The ethics board in each country approved the study. We complied with ethical standards and collected written informed consent from the adolescents and their parents.
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
: Informed consent was obtained from all individual participants and their parents included in the study.