1. Influenza Division, Centers for Disease Control and Prevention
2. California Emerging Infections Program, Oakland
3. Connecticut Emerging Infections Program, Yale School of Public Health, New Haven, Connecticut
4. Emory University School of Medicine
5. Atlanta Veterans Affairs Medical Center
6. Georgia Emerging Infections Program, Atlanta, Georgia
7. Maryland Department of Health and Mental Hygiene, Baltimore
8. Minnesota Department of Health, St. Paul
9. New Mexico Department of Health, Santa Fe
10. Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester
11. Emerging Infections Program, New York State Department of Health, Albany, New York
12. Oregon Public Health Division, Portland
13. Department of Preventive Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee