Affiliation: | aVaccine and Infectious Diseases Organization, University of Saskatchewan, 120 Veterinary Road, Saskatoon, Saskatchewan, Canada S7N 5E3;bDepartment of Microbiology and Molecular Genetics, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15232, USA;cUniversity of Alberta, 3-7 University Hall, Edmonton, Alberta, Canada T6G 2J9 |