Funding for this research was provided by:
Medizinischen Fakultät, Ludwig-Maximilians-Universität München (FöFoLe Nr 935)
Received: 21 September 2019
Accepted: 5 December 2019
First Online: 27 December 2019
Ethics approval and consent to participate
: The consent of our ethics committee and the donors’ relatives was given before the experiments.
: Consent for publication of the data was obtained from the relatives of the donors before the start of the study.
: Markus Regauer reports personal fees from Arthrex, Naples, USA, outside the submitted work. Wolfgang Boecker reports personal fees from Lilly GmbH and from Amgen GmbH, outside the submitted work. The other authors declare that they have no competing interests.