1. Department of Veterinary Medicine Centro Universitário Ingá Maringá Brazil
2. Department of Surgery Universidade de São Paulo São Paulo Brazil
3. Department of Veterinary Surgery and Animal Reproduction Universidade Estadual Paulista Botucatu Brazil
4. Department of Animal Morphology and Physiology Universidade Estadual Paulista Jaboticabal Brazil
5. Department of Veterinary Clinical and Surgery Universidade Estadual Paulista Jaboticabal Brazil