1. School of Agricultural and Veterinarian Sciences; Preventive Veterinary Medicine and Animal Reproduction; São Paulo State University (Unesp); Jaboticabal Brazil
2. Veterinary Resources Inc.; Ames IA USA
3. Boehringer Ingelheim Vetmedica, Inc.; Ames IA USA
4. Veterinary Diagnostic and Production Animal Medicine; College of Veterinary Medicine; Iowa State University; Ames IA USA
5. School of Agricultural and Veterinarian Sciences; Veterinary Clinic and Surgery; São Paulo State University (Unesp); Jaboticabal Brazil