Received: 26 June 2019
Accepted: 24 March 2020
First Online: 2 April 2020
Ethics approval and consent to participate
: The <i>Health Survey</i> was registered at the German Clinical Trials Register (DRKS) operated by the German Institute of Medical Documentation and Information, Cologne, Germany (ID: DRKS00010089) and approved by the ethics committee of Ulm University (application number 188/15) and is in accordance with the Declaration of Helsinki. The parents provided written, informed consent for participation in this study, children provided oral assent.
: Not applicable.
: WM and AF contributed to the software development and may participate in the returns; the other authors have no conflict of interests to declare.