1. Department of Clinical Sciences, Cummings School of Veterinary Medicine Tufts University North Grafton Massachusetts USA
2. Department of Pathology Angell Animal Medical Center Boston Massachusetts USA
3. Department of Biomedical Sciences, Cummings School of Veterinary Medicine Tufts University North Grafton Massachusetts USA
4. Department of Ophthalmology Tufts Veterinary Emergency Treatment and Specialties Walpole Massachusetts USA