1. Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB T6G 2M8, Canada
2. Department of Medicine, University of Alberta, Edmonton, AB T6G 2G3, Canada
3. Department of Biochemistry, University of Alberta, Edmonton, AB T6G 2H7, Canada
4. University of Ottawa Heart Institute, Ottawa, ON K1Y 4W7, Canada
5. Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
6. Lunenfeld-Tanenbaum Research Institute, Mt. Sinai Hospital, Toronto, ON M5G 1X5, Canada
7. Department of Medicine, University of Toronto, Toronto, ON M5S 2J7, Canada