1. Programa de Pós Graduação em Ciências Veterinárias, Federal University of Paraná; Curitiba Brazil
2. Department of Veterinary Medicine; Federal University of Paraná; Curitiba Brazil
3. Small Animal Clinical Sciences, Michigan State University; East Lansing MI USA
4. CPGCV, Federal University of Paraná; Curitiba Brazil
5. Medicina Veterinária; Universidade Federal do Paraná - UFPR; Curitiba Brazil