1. Department of Clinical Sciences Oregon State University Corvallis Oregon USA
2. Department of Veterinary and Clinical Sciences The Ohio State University Columbus Ohio USA
3. Veterinary Emergency and Referral Center of Hawaii Honolulu Hawaii USA
4. Flint Animal Cancer Center Colorado State University Fort Collins Colorado USA
5. William R. Pritchard Veterinary Medical Teaching Hospital University of California Davis California USA
6. Bridge Animal Referral Center Edmonds Washington USA