Steven P. CudiaFrom the Departments of Clinical Studies (Cudia) and Pathobiology and the Pennsylvania Animal Disease Laboratory System (Poppenga, Birdsall), School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104-6044.
Robert H. PoppengaFrom the Departments of Clinical Studies (Cudia) and Pathobiology and the Pennsylvania Animal Disease Laboratory System (Poppenga, Birdsall), School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104-6044.
William J. BirdsallFrom the Departments of Clinical Studies (Cudia) and Pathobiology and the Pennsylvania Animal Disease Laboratory System (Poppenga, Birdsall), School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104-6044.