Received: 31 January 2019
Accepted: 20 June 2019
First Online: 3 July 2019
Ethics approval and consent to participate
: The ab natomical protocol of the study was accepted by Bioethics Committee of Medical University of Lodz (resolution RNN/297/17/KE). The cadavers belong to the Department of Normal and Clinical Anatomy of the Medical University of Lodz.
: Not applicable.
: The authors declare that they have no competing interests.