Funding for this research was provided by:
Albert-Ludwigs-Universität Freiburg im Breisgau
Article History
Received: 14 February 2020
Accepted: 15 December 2020
First Online: 26 January 2021
Compliance with ethical guidelines
:
: J. Vollmer, J. Lohmann and P. Giess-Stüber declare that they have no competing interests.
: The study was approved by the Ethics Committee of the Medical Faculty of the University of Freiburg and the Regional Administrative Councils. Data were collected using paper–pencil selfadministered questionnaires. Before data collection, parents (or guardians) gave their written consent for the participants to take part in the study. Participants were treated following the American Psychological Association’s ethical guidelines regarding confidentiality and anonymity.