Due to a production error, the Ethics Statement section of the article was erroneously removed. The section appears below.
“Ethics Statement
The study was approved by the Research Ethics Board of Section for Medicine and Surgery, Department of Veterinary Clinical Sciences, University of Copenhagen, Copenhagen, Denmark.”
The publisher apologizes for this mistake. The original article has been updated.
Publisher's Note
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.