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Authors
Stier, Christine https://orcid.org/0000-0002-7508-7775
Koschker, Ann-Kathrin
Isaev, Yaroslaw
Runkel, Norbert
Chiappetta, Sonja
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Article History
First Online: 5 February 2020
Compliance with Ethical Standards
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: The authors declare that they have no conflict of interest.
: Informed consent was obtained from all the individual participants included in the study.
: All procedures performed in this study involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.
: We did not receive any fund or grant for this research.
