1. Walter Reed Army Institute of Research, Silver Spring, Maryland.
2. Anti-Plague Station, Baku and Xachmaz, Azerbaijan.
3. Republican Veterinary Laboratory, Baku, Azerbaijan.
4. Center for Hygiene and Epidemiology, Quba, Qusar, and Xachmaz, Azerbaijan.
5. Raytheon Technical Services Company, Baku, Azerbaijan.
6. United States Army Medical Research Institute of Infectious Diseases, Fort Detrick, Maryland.