1. Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX 77555, USA
2. Department of Biology, Indiana University, Bloomington, IN 47405, USA
3. Institute of Technology, University of Tartu, Nooruse 1, 50411 Tartu, Estonia
4. Arbovirus Laboratory, Texas Department of State Health Services, 1100 West 49th Street, Austin, TX 78714, USA
5. Virology Division, United States Army Medical Research Institute of Infectious Diseases, 1425 Porter Street, Frederick, MD 21702, USA
6. Department of Pathology, Microbiology and Immunology, School of Veterinary Medicine, University of California, Davis, CA 95616, USA
7. Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, Fort Collins, CO 80521, USA