1. Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH, USA;
2. Department of Pathology, Faculty of Veterinary Medicine, Benha University, Kalyubia, Egypt;
3. Department of Pathology, Faculty of Veterinary Medicine, Bursa Uludag University, Bursa, Turkey;
4. Department of Microbiology and Molecular Genetics, School of Medicine, University of Pittsburgh, Pittsburgh, PA, USA;
5. Department of Medicine, Division of Oncology, Washington University School of Medicine, St. Louis, MO, USA;
6. Department of Biomedical Sciences, Heritage College of Osteopathic Medicine, Ohio University, Athens, OH, USA