THE EDITORS

JEFFREY J. ZIMMERMAN, DVM, PhD, DACVPM, is Professor of Disease Ecology in the Department of Veterinary Diagnostic and Production Animal Medicine at Iowa State University in Ames, Iowa, USA.

LOCKE A. KARRIKER, DVM, MS, DACVPM, is Professor of Veterinary Diagnostic and Production Animal Medicine and Director of the Swine Medicine Education Center at Iowa State University in Ames, Iowa, USA.

ALEJANDRO RAMIREZ, DVM, MPH, PhD, DACVPM, is Associate Professor of Veterinary Diagnostic and Production Animal Medicine at Iowa State University in Ames, Iowa, USA.

KENT J. SCHWARTZ, DVM, MS, is Clinical Professor and Diagnostician at the Iowa State University Veterinary Diagnostic Laboratory in Ames, Iowa, USA.

GREGORY W. STEVENSON, DVM, PhD, DACVP, is Professor of Veterinary Pathology and Diagnostic Pathologist at Iowa State University in Ames, Iowa, USA.

JIANQIANG ZHANG, MD, MS, PhD, is Associate Professor of Veterinary Diagnostic and Production Animal Medicine at Iowa State University in Ames, Iowa, USA. Less