1. Department of Psychiatry; Centre for Prions and Protein Folding Diseases, University of Alberta; Edmonton Alberta T6G 2M8 Canada
2. Department of Pharmacology; Qiqihar Medical University; Qiqihar Heilongjiang China
3. Department of Medicine; Centre for Prions and Protein Folding Diseases, University of Alberta; Edmonton Alberta T6G 2M8 Canada