1. Epidemic Intelligence Service, Centers for Disease Control and Prevention , Atlanta, Georgia , USA
2. Chicago Department of Public Health , Chicago, Illinois , USA
3. Departments of Internal Medicine, Rush University Medical Center , Chicago, Illinois , USA
4. National Center for HIV, Viral Hepatitis, STD, and TB Prevention, Centers for Disease Control and Prevention , Atlanta, Georgia , USA
5. Office of the Chief Operating Officer, Centers for Disease Control and Prevention , Atlanta, Georgia , USA
6. National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention , Atlanta, Georgia , USA
7. Department of Health and Human Services, Office of Strategic National Stockpile , Atlanta, Georgia , USA