1. Canadian Cooperative Wildlife Health Centre, Department of Veterinary Pathology, Western College of Veterinary Medicine, University of Saskatoon, Saskatoon, Saskatchewan, Canada S7N 5B4
2. National Wildlife Research Centre, Canadian Wildlife Service, Carleton University Campus, Ottawa, Ontario, Canada K1A 0H3
3. Toxicology Centre, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5B3