1. 1Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520- 8035, USA
2. 2Department of Biochemistry and Molecular Biology, University of Florida, Gainesville, FL 32610, USA
3. 3Department of Biology, Memorial University of Newfoundland, St John’s, NL A1B3X9, Canada
4. 4National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892, USA
5. 5Institute of Virology, University of Bonn Medical Centre, Bonn D-53105, Germany
6. 6MRC - University of Glasgow Centre for Virus Research, Glasgow G61 1QH, UK
7. 7INRA-Université de Montpellier, 34095 Montpellier Cedex 5, France
8. 8Department of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65211, USA
9. 9Department of Microbiology, Molecular Genetics and Immunology, University of Kansas Medical Center, Kansas City, KS 66160, USA
10. 10Department of Virology, University of Helsinki, FIN-00014 University of Helsinki, Finland
11. 11Department of Genetics, Yale University School of Medicine, New Haven, CT 06520-8035, USA
12. 12Centre de Recherche de Microbiologie et Biotechnologie, INRS-Institut Armand-Frappier Laval, QC H7V 1B7, Canada