1. Veterinary Medicine Department; Federal University of Paraná; Rua dos Funcionários, 1540 Juvevê Curitiba PR 80035-050 Brazil
2. Small Animal Clinical Sciences; Veterinary Medical Center; Michigan State University; 736 Wilson Road D-208 East Lansing MI 48824 USA
3. Department of Pathobiological Sciences; School of Veterinary Medicine; 1909 Skip Bertman Drive Baton Rouge LA 70803 USA
4. Retina e Vítreo Consultoria; Rua Mateus Leme; 2285 Curitiba PR 80530-010 Brazil