1. Rocky Mountain Laboratories, National Institute of Allergy & Infectious Disease, National Institutes of Health, Hamilton, Montana 59840, United States
2. Laboratory
Animal Center, Research Division, Korea Brain Research Institute, Daegu 41068, Republic of Korea
3. National CJD Research & Surveillance Unit, Centre for Clinical Brain Sciences, School of Clinical Sciences, University of Edinburgh, Edinburgh EH8 9YL, U.K.
4. Department
of Neurosciences, Biomedicine, and Movement Sciences, University of Verona, Verona 37129, Italy