Article History
Received: 2 September 2020
Accepted: 1 October 2020
First Online: 28 October 2020
Compliance with ethical guidelines
:
: J. Willin, J. Schmalzl, L. Lehmann, and C. Gerhardt declare that they have no competing interests.
: The study was approved by the local ethic committee. All patients gave their written informed consent before being included in the study.