1. Department of Morphology and Physiology, College of Agricultural and Veterinary Sciences, São Paulo State University, Jaboticabal Campus, Via de Acesso Professor Paulo Donato Castellane s/n, 14884-900 Jaboticabal, SP, Brazil.
2. Veterinary Hospital, Agulhas Negras Military Academy, Brazilian Army, Rod. Presidente Dutra, Km. 306, 27534-970 Resende, RJ, Brazil.
3. La Plata National University, Av 7 877, La Plata, 1900 Buenos Aires, Argentina.
4. Veterinary Institute, Federal Rural University of Rio de Janeiro, Rodovia BR 465, Km 07 s/n, Zona Rural, 23890-000 Seropédica, RJ, Brazil.