1. Department of Veterinary Medicine; Federal University of Paraná; Curitiba PR Brazil
2. Rua dos Funcionários; Laboratório de Oftalmologia Comparada; Hospital Veterinário; Curitiba PR Brazil
3. Diagnostic Center for Population and Animal Health; Michigan State University; Lansing MI USA
4. Werner & Werner Laboratory; Curitiba PR Brazil
5. Rua Tomazina, subsolo, Ahú; Curitiba PR Brazil
6. Clínica Veterinária Aconchego; Rua Presidente Campos Salles; Joinville SC Brazil
7. Department of Small Animal Clinical Sciences; Michigan State University; East Lansing MI USA