Funding for this research was provided by:
Else-Kröner-Fresenius-Stiftung (NAKSYS– 016_Kolleg.03)
Research Commission of the Faculty of Medicine, University of Freiburg (MZ)
Albert-Ludwigs-Universität Freiburg im Breisgau
Received: 9 May 2022
Accepted: 22 November 2022
First Online: 13 December 2022
: This study was approved by the Institutional Review Board of the University of Freiburg Medical School. Written informed consent was obtained from patients. It was not possible to get written informed consent from two deceased patients. As patient cases have been analyzed anonymously, this proceeding is usual for retrospective anonymous cohorts and was approved by the local Institutional Review Board.
: The patients agreed to have their non-identifiable information used for research and publishing.
: The authors declare that they have no competing interests.