1. From the Departments of Veterinary and Comparative Anatomy, Pharmacology and Physiology (S. Lahmers, Y.W., H.G.) and Veterinary Microbiology and Pathology (D.R.C.), Washington State University, Pullman, Wash; and Anästhesiologie und Operative Intensivmedizin (S. Labeit), Universitätsklinikum Mannheim, Mannheim, Germany.