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Article History

Received: 2 January 2021

Accepted: 12 April 2021

First Online: 21 April 2021

Declarations

:

: The authors declare that they have no conflict of interests.

: The cadavers belonged to the Donors and Dissecting Rooms Center, Universidad Complutense de Madrid, Spain. The bodies were under strict control by the ethical committee, in accordance to the ethical standards as laid down in the 1964 Declaration of Helsinki.

: Informed consent was obtained from all the participants included in the study.

: The authors affirm that human research participants provided informed consent for publication of the images in Figs. ,,and.