Affiliation: | 1. Laboratory of Veterinary Pathology, School of Veterinary Medicine, Universidade Norte do Paraná, PR 218, km 1, Cx. Postal 560, Arapongas, Paraná, 86702-670, Brazil 2. Laboratory of Molecular Biology, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Paraná, Brazil 3. Large Animal Internal Medicine, Department of Veterinary Clinics, Universidade Estadual de Londrina, Paraná, Brazil 4. Laboratory of Veterinary Pathology, Department of Veterinary Preventive Medicine, Universidade Estadual de Londrina, Paraná, Brazil
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