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Article History

Received: 21 December 2019

Accepted: 4 February 2020

First Online: 21 February 2020

Ethics approval and consent to participate

: Ethical approval has been obtained for the study from the University of Cologne (ID 17–273). Participants are informed verbally and receive written information (flyer) about the extent and the relevance of the study as well as the way of data collection and processing. All participants have the option to clarify questions about the study with research staff members. For study participation, it is required that both caregivers (if not living together) or guardians give their assent and informed consent.

: Not applicable.

: MD Manfred Döpfner received consulting income and research support from Lilly, Medice, Shire, Takeda, and Vifor and research support from the German Research Foundation, German Ministry of Education and Research, German Ministry of Health, and Innovation Fund. He received income as head, supervisor, and lecturer of the School of Child and Adolescent Cognitive Behaviour Therapy at the University Hospital Cologne and as consultant for Child Behaviour Therapy at the National Association of Statutory Health Insurance Physicians (Kassenärztliche Bundesvereinigung). He also received royalties from treatment manuals, books and psychological tests published by Beltz, Elsevier, Enke, Guilford, Hogrefe, Huber, Kohlhammer, Schattauer, Springer, Wiley.JP Julia Plück received royalties from treatment manuals and psychological tests published by Hogrefe.SS Stephanie Schürmann received royalties from treatment manuals, books and psychological tests published by Beltz, Hogrefe, and PITS.All other authors: No competing interests.