1. Section of Radiology; Department of Clinical Studies School of Veterinary Medicine; University of Pennsylvania; Philadelphia PA 19104
2. Redbank Veterinary Hospital; Tinton Falls NJ 07724
3. Department of Molecular Biomedical Sciences; College of Veterinary Medicine; North Carolina State University; Raleigh NC 27607
4. Department of Surgical and Radiological Sciences; College of Veterinary Medicine; University of California; Davis CA 95616