1. Department of Renewable Resources, University of Alberta, Edmonton, AB T6G 2G8, Canada
2. Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB T6G 2M8, Canada
3. Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2M8, Canada
4. Norwegian Institute for Nature Research (NINA), 7034 Trondheim, Norway
5. Department of Biomedicine and Veterinary Public Health Sciences, Swedish University of Agricultural Sciences, SE-750 07 Uppsala, Sweden
6. Faculty of Biosciences and Aquaculture, Nord University, 8026 Bodø, Norway
7. Department of Agricultural, Food and Nutritional Sciences, University of Alberta, Edmonton, AB T6G 2M8, Canada