1. Department of Microbiology and Immunology
2. the Center for Predictive Medicine for Biodefense and Emerging Infectious Diseases, University of Louisville, Louisville, Kentucky
3. Virology Research Center, School of Medicine of the University of São Paulo, Ribeirão Preto City, São Paulo, Brazil
4. Department of Virology, Haartman Institute, and Department of Basic Veterinary Sciences, University of Helsinki, HUSLAB, Helsinki, Finland