Affiliation: | 1. Department of Pathobiology, Ontario Veterinary College, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1, Canada;2. Department of Animal Biosciences, Center for Genetic Improvement of Livestock, University of Guelph, 50 Stone Road East, Guelph, Ontario N1G 2W1, Canada;3. Ontario Ministry of Agriculture and Rural Affairs, 1 Stone Road W, Guelph, Ontario N1G 4Y2, Canada |