von Heymann, Wolfgang
Moll, Horst
Rauch, Geraldine
Article History
First Online: 29 May 2018
Compliance with ethical guidelines
:
: W. von Heymann, H. Moll, and G. Rauch declare that they have no competing interests.
: All procedures performed in studies 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 (approved by the ethics commission of the Chamber of Physicians of Baden-Wuerttemberg under the number F‑2016-037). Informed consent was obtained from all individual participants included in the study. Additional informed consent was obtained from all individual participants from whom identifying information is included in this article.