Received: 6 January 2021
Accepted: 30 April 2021
First Online: 7 June 2021
: This project was performed in accordance with the Swiss Animal Welfare Act (SR 455). All animals died due to reasons unrelated to the study. Informed consent was obtained from all the owners of the deceased animals to be used for teaching and research purposes. We do not report experiments on live vertebrates. Formal ethical approval was not required due to the postmortem nature of the study.
: The authors declare that they have no competing interests.