1. Department of Veterinary Medicine and Surgery, University of Missouri, Columbia, MO 65211, USA
2. Hematology/Oncology Division, Department of Internal Medicine, University of Missouri, Columbia, MO 65211, USA
3. Department of Veterinary Clinical Sciences, Washington State University, Pullman, WA 99164, USA
4. Department of Veterinary Medicine and Surgery, University of Missouri Public Health Program, University of Missouri, Columbia, MO 65211, USA
5. Department of Pathology and Anatomical Sciences, School of Medicine and Ellis Fischel Cancer Center, University of Missouri, Columbia, MO 65211, USA