1. College of Agricultural and Technological Sciences, São Paulo State University (UNESP), São Paulo, Brazil
2. Department of Indian Nursing Council, Prairie Swine Centre, Saskatoon,SK, Canada
3. Department of Animal and Poultry Science, University of Saskatchewan, Saskatoon, SK, Canada
4. College of Veterinary Medicine and Animal Sciences, São Paulo State University (UNESP), São Paulo, Brazil