1. Department of Surgery, Mayo Clinic, Rochester, Minnesota, USA.
2. Department of Laboratory Medicine and Pathology, and Mayo Clinic, Rochester, Minnesota, USA.
3. Department of Immunology, Mayo Clinic, Rochester, Minnesota, USA.
4. National Swine Resource and Research Center, Division of Animal Sciences, University of Missouri–Columbia, Columbia, Missouri, USA.
5. Department of Surgery, University of Michigan, Ann Arbor, Michigan, USA.