Erben, Hans-Christoph
Hess, Florian
Welter, JoEllen
Graf, Nicole
Steurer, Marc P.
Neff, Thomas A.
Zettl, Ralph
Dullenkopf, Alexander http://orcid.org/0000-0002-1456-6457
Article History
Received: 21 September 2020
Accepted: 1 January 2021
First Online: 19 February 2021
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: This retrospective medical record review involving human participants was carried out in accordance with the standards of the cantonal ethics committee and with the 1964 Helsinki Declaration and its later amendments. Written consent of the patients whose data were used to conduct the analyses was waived based on the study design.