First Online: 28 May 2020
Compliance with ethical standards
: No external funding was used to conduct this work.
: The authors, Iryna Dykun, Daniela Wiefhoff, Matthias Totzeck, Fadi Al-Rashid, R. Alexander Jánosi, Stefanie Hendricks, Tienush Rassaf, and Amir A. Mahabadi, declare that they have no conflict of interest.
: The datasets generated during and/or analyzed during the current study are not publicly available due to institutional restrictions, but are available from the corresponding author on reasonable request.
: Not applicable.