1. Center for Biomedical Engineering and Technology and Department of Anatomy and Neurobiology, University of Maryland School of Medicine, Baltimore, MD, USA
2. Laboratory of Persistent Viral Diseases, Rocky Mountain Laboratories, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
3. CIMUS Biomedical Research Institute and Department of Medical Sciences, University of Santiago de Compostela-IDIS, Santiago de Compostela, Spain
4. Departments of Pathology and Medicine, University of California San Diego, La Jolla, CA, USA
5. Departments of Pathology, and of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH, USA
6. Department of Biochemistry and Centre for Prions and Protein Folding Diseases, University of Alberta, Edmonton, AB, Canada