1. Department of Biochemistry and Immunology, Ribeirão Preto School of Medicine, University of São Paulo, Avenida Bandeirantes 3900, Monte Alegre, Ribeirão Preto, SP 14049-900, Brazil.
2. São Paulo State Animal Science Institute, Rua Heitor Penteado, 56, Nova Odessa, SP 13460-000, Brazil.
3. School of Veterinary Medicine, Federal University of Uberlândia, Av. Pará, 1720, Campus Umuarama-Bloco 2T, 38400-902 Uberlândia, MG, Brazil.
4. Faculty of Agricultural and Natural Sciences, University of Pretoria, Department of Genetics, Private bag X20, Hatfield 0028 Pretoria, South Africa.