1. Historical trends related to bioterrorism: an empirical analysis;Tucker;Emerg Infect Dis,1999
2. Biological and chemical terrorism: strategic plan for preparedness and response: recommendations of the CDC Strategic Planning Workgroup;Centers for Disease Control and Prevention;MMWR Recomm Rep,2000
3. The economic impact of a bioterrorist attack: are prevention and postattack intervention programs justifiable?;Kaufmann;Emerg Infect Dis,1997
4. Public-health preparedness for biological terrorism in the USA;Khan;Lancet,2000
5. Update: investigation of anthrax associated with intentional exposure and interim public health guidelines, October 2001;Centers for Disease Control and Prevention;MMWR Morb Mortal Wkly Rep,2001