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Contributors All authors helped design the study protocol, collect the data in the cadaveric study, analyze data and edit the manuscript. JKN and SB collected the data in the volunteer study.
Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.
Competing interests None declared.
Patient consent for publication Not required.
Ethics approval The study was performed with approval by the Regional Committee on Health Research Ethics (Capital Region of Denmark, Protocol No 17017688). The head of the Body Donation Program at the Department of Cellular and Molecular Medicine approved the study.
Provenance and peer review Not commissioned; externally peer reviewed.
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