1. Division of Foodborne, Waterborne, and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
2. Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia
3. Oregon Health Authority, Portland
4. Oregon Emerging Infections Program, Portland
5. Emory University School of Medicine, Atlanta
6. Georgia Emerging Infections Program, Atlanta
7. University of Pittsburgh, Pennsylvania
8. Maryland Emerging Infections Program, Baltimore
9. Vanderbilt University School of Medicine, Nashville
10. Tennessee Emerging Infections Program, Nashville
11. University of Rochester Medical Center, Rochester
12. New York Emerging Infections Program, Rochester
13. Division of Healthcare Quality Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia