Südwasser, S.
Bock, N. C.
Jost, J.
Killat, S.
Ruf, S.
Funding for this research was provided by:
Justus-Liebig-Universität Gießen
Article History
Received: 7 May 2020
Accepted: 31 October 2020
First Online: 13 January 2021
Compliance with ethical guidelines
:
: S. Südwasser, N. C. Bock, J. Jost, S. Killat and S. Ruf declare that they have no competing interests.
: The protocol for this retrospective investigation was approved by the ethical committee of University of Giessen, Giessen, Germany (80/14). The study was retrospective, so—in accordance with the ethical approval—no written informed consent was obtained. The manuscript does not include data related to individual persons.