Funding for this research was provided by:
Received: 8 December 2020
Accepted: 30 June 2021
First Online: 31 July 2021
: All blood donors gave their written informed consent to the use of their blood sample for scientific research in the context of this study. The blood used was residue from the blood bank. The Ethics Committee of Friedrich-Alexander-Universität Erlangen-Nürnberg approved the study (21_ 19 B).
: Not applicable.
: The authors declare that they have no competing interests.