1. Biology of Vector-Borne Viruses Section, Laboratory of Virology, Rocky Mountain Laboratories, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, USA
2. Arthropod-Borne Animal Disease Research Unit, Center for Grain and Animal Health Research, Agricultural Research Service, United States Department of Agriculture, Manhattan, Kansas, USA
3. Rocky Mountain Veterinary Branch, Rocky Mountain Laboratories, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, USA
4. Office of the Chief, Laboratory of Virology, Rocky Mountain Laboratories, Division of Intramural Research, National Institute for Allergy and Infectious Diseases, National Institutes of Health, Hamilton, Montana, USA