Raquel M. Walton, VMD, MS, PhD, DACVP (Clinical Pathology) is a Senior Veterinary Clinical Pathologist at IDEXX Laboratories in Langhorne, Pennsylvania, USA. Rick L. Cowell, DVM, MS, DACVP (Clinical Pathology), is recently retired as a Clinical Pathologies at IDEXX Laboratorie in Stillwater, Oklahoma, USA. Amy C. Valenciano, DVM, MS, DACVP (Clinical Pathology), is a Senior Veterinary Clinical Pathologist at IDEXX Laboratories in Dallas, Texas, USA.