Received: 6 June 2019
Accepted: 17 April 2020
First Online: 24 May 2020
Ethics approval and consent to participate
: This study was conducted using cadavers of animals euthanized for reasons unrelated to this project and for such type of research, it is not necessary in Switzerland to obtain prior ethical approval, and no permissions were required to collect the cadavers used in this study.
: Not applicable.
: The authors declare that they have no competing interests.