1. Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, Ohio.
2. The Veterinary Teaching Hospital, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio.
3. The OSU Comprehensive Cancer Center, The Ohio State University; Columbus, Ohio.
4. IDEXX Laboratories, Westbrook, Maine.
5. Clínica Veterinaria Merced, Calpe, Spain.
6. Studio Veterinario Bisio-Sangiorgio-Tagliabue, Genoa, Italy.
7. Clínica Mediterráneo, Madrid, Spain.