Abstract

The affiliation of the fourth author, Nicole Kirchhof, was published in this article as:
Medtronic, Inc., Minneapolis, Minnesota.
The affiliation should have been listed as:
Department of Veterinary Population Science, University of Minnesota, St. Paul, Minnesota.
Andrew Friberg should have been listed in the Acknowledgments for his technical assistance. His contributions in that area were inadvertently omitted from the acknowledgments list.
The authors apologize for these errors.
