1. Department of Veterinary Pathobiology; College of Veterinary Medicine & Biomedical Science; Texas A&M University; College Station TX 77843 USA
2. Dermatopathology Specialty Service; College of Veterinary Medicine & Biomedical Science; Texas A&M University; College Station TX 77843 USA
3. Faculty of Veterinary Science; University of Sydney; Sydney New South Wales 2006 Australia
4. Department of Biomedical Science; College of Veterinary Medicine; Cornell University; Ithaca NY 14850 USA