Text and Data Mining valid from 2019-05-23
Received: 25 March 2019
Accepted: 17 May 2019
First Online: 23 May 2019
Ethics approval and consent to participate
: Not applicable. The specimens were taken from the body donation program of Saarland University Medical Center, Institute of Anatomy and Cell Biology. The bodies were donated by individuals who, prior to death, had given informed consent for their use for scientific and educational purposes. Therefore, an Ethics Committee agreement was not obtained for this study.
: Not applicable.
: The authors declare that they have no competing interests.