Patrícia F. CastroVeterinary Medical Teaching Hospital, School of Veterinary Medicine, University of São Paulo, Cidade Universitária, SP, CEP 05508-900, Brazil.
Silvana M. UnruhVeterinary Medical Teaching Hospital, School of Veterinary Medicine, University of São Paulo, Cidade Universitária, SP, CEP 05508-900, Brazil.
Cássio R. A. FerrignoDepartment of Veterinary Surgery, School of Veterinary Medicine, University of São Paulo, Cidade Universitária, SP, CEP 05508-900, Brazil.
Denise T. FantoniDepartment of Veterinary Surgery, School of Veterinary Medicine, University of São Paulo, Cidade Universitária, SP, CEP 05508-900, Brazil.