1. Department of Veterinary Sciences, Michale E. Keeling Center for Comparative Medicine and Research, University of Texas MD Anderson Cancer Center, Bastrop, TX, USA
2. Bethesda, MD, USA
3. National CJD Surveillance Unit, Western General Hospital, Edinburgh, UK
4. Department of Comparative Medicine, College of Medicine, University of South Alabama, Mobile, AL, USA
5. Global Pathogen Safety, Baxter Bioscience, Vienna, Austria