The editors Mary Anna Thrall DVM, MS, DACVP, is Professor of Veterinary Clinical Pathology in the Department of Biomedical Sciences at Ross University School of Veterinary Medicine in St. Kitts, West Indies and Professor Emerita, Department of Microbiology, Immunology and Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA. Glade Weiser DVM, DACVP, retired as Professor, clinical pathologist, and former Head in the Department of Pathology, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA. Robin W. Allison DVM, PhD, DACVP, retired at the rank of Professor from Oklahoma State University's Center for Veterinary Health Sciences in Stillwater, Oklahoma, USA. Terry Campbell, DVM, PhD, is Associate Professor Emeritus of Zoological Medicine, Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins Colorado, USA.