1. Government of the Northwest Territories, Department of Environment and Natural Resources, PO Box 240, Fort Simpson, Northwest Territories X0E 0N0, Canada
2. Government of the Northwest Territories, Department of Environment and Natural Resources, 600, 5102-50th Avenue, Yellowknife, Northwest Territories X1A 3S8, Canada
3. 22 Champlin Crescent, Saskatoon, Saskatchewan S7H 4T3, Canada
4. Department of Veterinary Microbiology, Western College of Veterinary Medicine, University of Saskatchewan, 52 Campus Drive, Saskatoon, Saskatchewan S7N 5B4, Canada