1. Epidemic Intelligence Service Program, Centers for Disease Control and Prevention, Atlanta, Georgia
2. Respiratory Diseases Branch, Centers for Disease Control and Prevention, Atlanta, Georgia
3. Division of Foodborne, Waterborne, and Environmental Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
4. Division of Infectious Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia
5. Johns Hopkins Bloomberg School of Public Health, The Johns Hopkins University, Baltimore, Maryland
6. New York State Department of Health, Albany
7. New Mexico Department of Health, Santa Fe
8. Minnesota Department of Health, St Paul
9. Colorado School of Public Health, University of Colorado Denver, Aurora
10. Colorado Department of Public Health and Environment, Denver
11. Vanderbilt University Medical Center, Nashville, Tennessee
12. Oregon Public Health Division, Portland
13. California Department of Public Health, Richmond
14. Connecticut Department of Public Health, Hartford
15. Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia