The editors Jim E. Riviere, DVM, PhD, DSc (hon), ATS, is The MacDonald Chair in Veterinary Medicine, University Distinguished Professor, Kansas Bioscience Eminent Scholar, and Director, Institute of Computational Comparative Medicine at Kansas State University in Manhattan, Kansas, USA. He is also a Distinguished Professor Emeritus at North Carolina State University in Raleigh, North Carolina, USA. Mark G. Papich, DVM, MS, Diplomate ACVCP, has the Burroughs Wellcome Professorship in Veterinary Pharmacology and is a Professor of Clinical Pharmacology, Department of Molecular Biomedical Sciences, College of Veterinary Medicine at North Carolina State University in Raleigh, North Carolina, USA.