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Article History

Received: 16 August 2018

Accepted: 20 February 2019

First Online: 1 March 2019

Ethics approval and consent to participate

: The study was submitted to the responsible ethics committee of the city of Vienna (in German: <i>“Ethikkommission der Stadt Wien”</i>; belongs to the city of Vienna <i>“Stadt Wien”</i>; ExternalRef removed) and approved without further detailed review (EK 14–274-VK_NZ). Eligible participants were first asked whether they would like to participate in the study and were informed in detail about the study and the right to withdraw at any time. All participants gave oral and written informed consent. Participating children assented to the intervention program in addition to their parents’ written consent. All data were handled with strict confidentiality and were only used for research purposes.

: Not applicable. No identifying images or other personal or clinical details of participants that compromise anonymity are presented within this publication.

: The authors declare that they have no competing interests with respect to the research, authorship, and publication of this article.

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