Funding for this research was provided by:
Universität Bern
Article History
Received: 4 May 2021
Accepted: 24 May 2021
First Online: 18 June 2021
Declarations
: Samples are the same as in [2]. All samples were collected with informed written consent. They were reversibly anonymized, to permit the donors to exert their right to withdraw their sample at any time. The Institute of Forensic Medicine, University of Bern, obtained the samples under an arbitrary number. The written consent documents with the names of the donors remained with the Red Cross. All documents distributed to the donors upon sampling were submitted to the responsible cantonal ethical committee and approval obtained.
: The authors declare no competing interests.