1. Monoclonal Antibody Section, National Centre for Foreign Animal Disease, 1015 Arlington St., Winnipeg, Manitoba, Canada
2. Department of Medical Microbiology, University of Manitoba, Canada
3. University of California San Diego, and the Sam and Rose Stein Institute for Aging, San Diego, CA
4. Department of Microbiology, Oxford, UK
5. The Skaggs Institute for Chemical Biology and the Department of Molecular Biology, The Scripps Research Institute