Conception and design of the study, technical procedures, manuscript preparation and writing, critical revision, final approval. II Graduate student, FCAV-UNESP, Jaboticabal-SP, Brazil. Acquisition, analysis and interpretation of data; manuscript preparation. III Post-doctorate, Postgraduate Program in Veterinary Surgery, FCAV-UNESP, Jaboticabal-SP, Brazil. Conception and design of the study, analysis and interpretation of data, technical procedures, statistics analysis, manuscript preparation and writing, critical revision, final approval. IV Fellow PhD degree, Postgraduate Program in Veterinary Surgery, FCAV-UNESP, Jaboticabal-SP, Brazil. Acquisition of data, technical procedures, statistics analysis, manuscript preparation and writing, critical revision, final approval.