Text and Data Mining valid from 2020-01-08
First Online: 8 January 2020
Compliance with ethical guidelines
: A. Bohnert, A. Keilmann, C. Harmuth, B. Wachtlin, and T. Rader declare that they have no conflict of interest. V. Schirkonyer is now a member of PATH MEDICAL GmbH, Germering, Germany. The authors alone are responsible for the content and writing of the paper.
: All procedures performed in studies involving human participants were in accordance with the Ethical Standards of the Institutional or National Research Committee guidelines and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. This study was approved by the local Ethics Committee Landesärztekammer Rheinland-Pfalz (approval number 837.021.09 (6526)) and subjects included in the study or their guardians agreed to be participants and gave written informed consent.
: The supplement containing this article is not sponsored by industry.