1. Enteric Diseases Epidemiology Branch, National Center for Zoonotic, Vector-borne and Enteric Disease
2. Epidemic Intelligence Service, Office of Workforce and Career Development
3. Environmental Health Services Branch, National Center for Environmental Health and
4. Air Pollution and Respiratory Health Branch, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
5. Illinois Department of Public Health, Springfield, Illinois, USA
6. Volatile Organic Compound Laboratory, National Center for Environmental Health and
7. Division of Parasitic Diseases, National Center for Infectious Disease, Centers for Disease Control and Prevention, Atlanta, Georgia, USA