Funding for this research was provided by:
Technische Universität Dortmund
Article History
First Online: 31 October 2020
Compliance with Ethical Standards
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: Open Access funding enabled and organized by Projekt DEAL. No sources of funding were used to assist in the preparation of this letter.
: Philipp Zimmer, Florian Javelle, and Amit Lampit declare that they have no conflicts of interest relevant to the content of this letter.
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