1. Department of Clinical Sciences (Baltzer), College of Veterinary Medicine, Oregon State University, 105 Magruder Hall, Corvallis, Oregon 97331; the
2. Departments of Pathobiology (Calise, Edwards) and Small Animal Medicine and Surgery (Levine, Steiner), College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas 77843-4474; and the
3. Department of Pathology (Shelton), School of Medicine, University of California–San Diego, La Jolla, California 92093-0709
4. From the