By Rose E. Raskin, DVM, PhD, Diplomate, ACVP, Associate Professor, Clinical Pathology, Service Chief, Clinical Pathology Laboratory, Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL; and Denny J. Meyer, DVM, Diplomate, ACVIM, Diplomate ACVP, Director, Pathology, Life Sciences, Gilead Sciences, Inc, Boulder, CO |