Funding for this research was provided by:
Received: 25 March 2020
Accepted: 19 January 2021
First Online: 12 February 2021
Ethics approval and consent to participate
: The experimental procedures were approved by the ethical committee according to the German Animal Welfare Law and Guidelines under the code 31/2017. The fat retrieval was approved by the Institutional review board of the Faculty of Medicine (Reg.– No 141/04) at Justus Liebig University, Giessen.
: Not applicable
: The authors declare no competing interests.