Received: 22 August 2018
Accepted: 11 January 2019
First Online: 4 February 2019
Ethics approval and consent to participate
: The data used were available and no permission was needed. No ethics approval was needed due to the retrospective design of the study. Cadavers were from dogs euthanised independently of this study.
: Not applicable.
: The authors declare that they have no competing interests.
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